975 lines
39 KiB
C#
975 lines
39 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using Microsoft.Xna.Framework;
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using Microsoft.Xna.Framework.Graphics;
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namespace Kav
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{
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public class Renderer
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{
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private GraphicsDevice GraphicsDevice { get; }
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private VertexBuffer FullscreenTriangle { get; }
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private DeferredPBREffect DeferredPBREffect { get; }
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/* FIXME: these next two dont actually have anything to do with PBR */
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private DeferredPBR_GBufferEffect Deferred_GBufferEffect { get; }
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private DeferredPBR_AmbientLightEffect DeferredAmbientLightEffect { get; }
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private DeferredPBR_PointLightEffect DeferredPointLightEffect { get; }
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private DeferredPBR_DirectionalLightEffect DeferredDirectionalLightEffect { get; }
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private Deferred_ToonEffect Deferred_ToonEffect { get; }
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private SimpleDepthEffect SimpleDepthEffect { get; }
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private SimpleDepthEffectInstanced SimpleDepthEffectInstanced { get; }
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private LinearDepthEffect LinearDepthEffect { get; }
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private LinearDepthEffectInstanced LinearDepthEffectInstanced { get; }
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private Effect ToneMapEffect { get; }
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private SkyboxEffect SkyboxEffect { get; }
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private DiffuseLitSpriteEffect DiffuseLitSpriteEffect { get; }
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private Kav.Model UnitCube { get; }
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private Kav.Model UnitSphere { get; }
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public Renderer(
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GraphicsDevice graphicsDevice
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) {
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GraphicsDevice = graphicsDevice;
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SimpleDepthEffect = new SimpleDepthEffect(GraphicsDevice);
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SimpleDepthEffectInstanced = new SimpleDepthEffectInstanced(GraphicsDevice);
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LinearDepthEffect = new LinearDepthEffect(GraphicsDevice);
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LinearDepthEffectInstanced = new LinearDepthEffectInstanced(GraphicsDevice);
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DeferredPBREffect = new DeferredPBREffect(GraphicsDevice);
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Deferred_GBufferEffect = new DeferredPBR_GBufferEffect(GraphicsDevice);
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DeferredAmbientLightEffect = new DeferredPBR_AmbientLightEffect(GraphicsDevice);
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DeferredPointLightEffect = new DeferredPBR_PointLightEffect(GraphicsDevice);
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DeferredDirectionalLightEffect = new DeferredPBR_DirectionalLightEffect(GraphicsDevice);
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ToneMapEffect = new Effect(graphicsDevice, Resources.ToneMapEffect);
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Deferred_ToonEffect = new Deferred_ToonEffect(GraphicsDevice);
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SkyboxEffect = new SkyboxEffect(GraphicsDevice);
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DiffuseLitSpriteEffect = new DiffuseLitSpriteEffect(GraphicsDevice);
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FullscreenTriangle = new VertexBuffer(GraphicsDevice, typeof(VertexPositionTexture), 3, BufferUsage.WriteOnly);
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FullscreenTriangle.SetData(new VertexPositionTexture[3] {
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new VertexPositionTexture(new Vector3(-1, -3, 0), new Vector2(0, 2)),
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new VertexPositionTexture(new Vector3(-1, 1, 0), new Vector2(0, 0)),
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new VertexPositionTexture(new Vector3(3, 1, 0), new Vector2(2, 0))
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});
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UnitCube = Kav.ModelLoader.Load(
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GraphicsDevice,
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Smuggler.Importer.ImportGLB(GraphicsDevice, new MemoryStream(Resources.UnitCubeModel))
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);
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UnitSphere = Kav.ModelLoader.Load(
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graphicsDevice,
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Smuggler.Importer.ImportGLB(graphicsDevice, new MemoryStream(Resources.UnitSphereModel))
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);
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}
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public static (T[], DynamicVertexBuffer) CreateInstanceVertexBuffer<T>(
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GraphicsDevice graphicsDevice,
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int instanceVertexCount
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) where T : IVertexType {
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var positionData = new T[instanceVertexCount];
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var vertexBuffer = new DynamicVertexBuffer(
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graphicsDevice,
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typeof(T),
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instanceVertexCount,
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BufferUsage.WriteOnly
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);
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return (positionData, vertexBuffer);
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}
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public static RenderTargetCube CreateShadowCubeMap(
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GraphicsDevice graphicsDevice,
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int shadowMapSize
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) {
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return new RenderTargetCube(
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graphicsDevice,
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shadowMapSize,
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false,
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SurfaceFormat.Single,
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DepthFormat.Depth24,
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0,
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RenderTargetUsage.PreserveContents
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);
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}
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public static DirectionalShadowMapData CreateDirectionalShadowMaps(
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GraphicsDevice graphicsDevice,
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int shadowMapSize,
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int numCascades
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) {
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return new DirectionalShadowMapData(
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graphicsDevice,
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shadowMapSize,
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numCascades
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);
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}
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// TODO: we could make this a lot more efficient probably
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// draws mesh sprites with a forward rendered diffuse lighting technique
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public void MeshSpriteRender(
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RenderTarget2D renderTarget,
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PerspectiveCamera camera,
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IEnumerable<(MeshSprite, SpriteBillboardConstraint, Matrix)> meshSpriteBillboardTransforms,
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AmbientLight ambientLight,
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IEnumerable<PointLight> pointLights,
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DirectionalLight? directionalLight
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) {
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GraphicsDevice.SetRenderTarget(renderTarget);
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GraphicsDevice.DepthStencilState = DepthStencilState.DepthRead;
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GraphicsDevice.RasterizerState = RasterizerState.CullNone;
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GraphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
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GraphicsDevice.SamplerStates[1] = SamplerState.PointClamp;
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GraphicsDevice.BlendState = BlendState.AlphaBlend;
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DiffuseLitSpriteEffect.View = camera.View;
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DiffuseLitSpriteEffect.Projection = camera.Projection;
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DiffuseLitSpriteEffect.AmbientColor =
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ambientLight.Color.ToVector3();
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if (directionalLight.HasValue)
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{
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DiffuseLitSpriteEffect.DirectionalLightDirection =
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directionalLight.Value.Direction;
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DiffuseLitSpriteEffect.DirectionalLightColor =
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directionalLight.Value.Color.ToVector3() * directionalLight.Value.Intensity;
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}
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else
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{
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DiffuseLitSpriteEffect.DirectionalLightColor = Vector3.Zero;
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}
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var i = 0;
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foreach (var pointLight in pointLights)
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{
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if (i > DiffuseLitSpriteEffect.MaxPointLights) { break; }
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DiffuseLitSpriteEffect.PointLights[i] = pointLight;
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i += 1;
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}
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var boundingFrustum = new BoundingFrustum(camera.View * camera.Projection);
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foreach (var (sprite, transform) in FrustumCull(boundingFrustum, BillboardTransforms(camera, meshSpriteBillboardTransforms)))
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{
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DiffuseLitSpriteEffect.NormalMapEnabled = sprite.Normal != null;
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DiffuseLitSpriteEffect.World = transform;
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GraphicsDevice.Textures[0] = sprite.Texture;
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GraphicsDevice.Textures[1] = sprite.Normal;
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GraphicsDevice.SetVertexBuffer(sprite.VertexBuffer);
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GraphicsDevice.Indices = sprite.IndexBuffer;
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foreach (var pass in DiffuseLitSpriteEffect.CurrentTechnique.Passes)
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{
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pass.Apply();
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GraphicsDevice.DrawIndexedPrimitives(
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PrimitiveType.TriangleList,
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0,
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0,
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sprite.VertexBuffer.VertexCount,
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0,
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2
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);
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}
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}
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}
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private static IEnumerable<(MeshSprite, Matrix)> BillboardTransforms(
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PerspectiveCamera camera,
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IEnumerable<(MeshSprite, SpriteBillboardConstraint, Matrix)> meshSpriteBillboardTransforms
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) {
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foreach (var (sprite, billboardConstraint, transform) in meshSpriteBillboardTransforms)
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{
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if (billboardConstraint == SpriteBillboardConstraint.None)
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{
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yield return (sprite, transform);
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}
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else if (billboardConstraint == SpriteBillboardConstraint.Horizontal)
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{
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yield return (sprite, Matrix.CreateConstrainedBillboard(
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transform.Translation,
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camera.Position,
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Vector3.Up,
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camera.Forward,
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camera.Position - transform.Translation
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));
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}
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else
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{
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yield return (sprite, Matrix.CreateConstrainedBillboard(
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transform.Translation,
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camera.Position,
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Vector3.Up,
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null,
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null
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));
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}
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}
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}
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// Renders a series of drawable-transform pairs using an effect that has a World matrix.
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// Effect must be pre-configured!!
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public static void CullAndRenderIndexed<T, U>(
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GraphicsDevice graphicsDevice,
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BoundingFrustum boundingFrustum,
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IEnumerable<(T, Matrix)> drawableTransformPairs,
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U effect
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) where T : IIndexDrawable, ICullable where U : Effect, IHasWorldMatrix
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{
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foreach (var (drawable, transform) in FrustumCull(boundingFrustum, drawableTransformPairs))
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{
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effect.World = transform;
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RenderIndexed(
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graphicsDevice,
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drawable,
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effect
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);
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}
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}
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public static void RenderIndexed<T, U>(
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GraphicsDevice graphicsDevice,
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T drawable,
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U effect
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) where T : IIndexDrawable where U : Effect
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{
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graphicsDevice.SetVertexBuffer(drawable.VertexBuffer);
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graphicsDevice.Indices = drawable.IndexBuffer;
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foreach (var pass in effect.CurrentTechnique.Passes)
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{
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pass.Apply();
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graphicsDevice.DrawIndexedPrimitives(
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PrimitiveType.TriangleList,
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0,
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0,
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drawable.VertexBuffer.VertexCount,
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0,
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drawable.IndexBuffer.IndexCount / 3
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);
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}
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}
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public static void RenderInstanced<T>(
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GraphicsDevice graphicsDevice,
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T drawable,
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VertexBuffer instanceVertexBuffer,
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int numInstances,
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Effect effect
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) where T : IIndexDrawable {
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graphicsDevice.SetVertexBuffers(
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drawable.VertexBuffer,
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new VertexBufferBinding(instanceVertexBuffer, 0, 1)
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);
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graphicsDevice.Indices = drawable.IndexBuffer;
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foreach (var pass in effect.CurrentTechnique.Passes)
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{
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pass.Apply();
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graphicsDevice.DrawInstancedPrimitives(
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PrimitiveType.TriangleList,
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0,
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0,
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drawable.VertexBuffer.VertexCount,
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0,
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drawable.IndexBuffer.IndexCount / 3,
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numInstances
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);
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}
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}
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// TODO: can probably make this static somehow
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public void RenderFullscreenEffect(
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Effect effect
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) {
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foreach (var pass in effect.CurrentTechnique.Passes)
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{
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pass.Apply();
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GraphicsDevice.SetVertexBuffer(FullscreenTriangle);
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GraphicsDevice.DrawPrimitives(PrimitiveType.TriangleList, 0, 1);
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}
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}
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public void RenderDepthIndexed<T>(
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RenderTarget2D renderTarget,
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PerspectiveCamera camera,
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IEnumerable<(T, Matrix)> drawableTransforms
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) where T : ICullable, IIndexDrawable
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{
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GraphicsDevice.SetRenderTarget(renderTarget);
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GraphicsDevice.DepthStencilState = DepthStencilState.Default;
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SimpleDepthEffect.View = camera.View;
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SimpleDepthEffect.Projection = camera.Projection;
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CullAndRenderIndexed(
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GraphicsDevice,
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new BoundingFrustum(camera.View * camera.Projection),
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drawableTransforms,
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SimpleDepthEffect
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);
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}
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public void RenderSkybox(
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RenderTarget2D renderTarget,
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PerspectiveCamera camera,
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TextureCube skybox
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) {
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GraphicsDevice.SetRenderTarget(renderTarget);
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GraphicsDevice.RasterizerState.CullMode = CullMode.CullClockwiseFace;
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GraphicsDevice.DepthStencilState = DepthStencilState.DepthRead;
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SkyboxEffect.Skybox = skybox;
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var view = camera.View;
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view.Translation = Vector3.Zero;
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SkyboxEffect.View = view;
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SkyboxEffect.Projection = camera.Projection;
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RenderIndexed(
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GraphicsDevice,
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UnitCube.Meshes[0].MeshParts[0],
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SkyboxEffect
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);
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GraphicsDevice.RasterizerState.CullMode = CullMode.CullCounterClockwiseFace;
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}
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/// <summary>
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/// GBuffer binding must have 4 render targets.
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/// Assumes that vertex buffer has been filled.
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/// </summary>
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public void RenderGBufferInstanced<T>(
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RenderTargetBinding[] gBuffer,
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RenderTarget2D depthBuffer,
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PerspectiveCamera camera,
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T drawable,
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VertexBuffer instanceVertexBuffer,
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int numInstances
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) where T : IGBufferDrawable, IIndexDrawable {
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GraphicsDevice.SetRenderTargets(gBuffer);
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GraphicsDevice.DepthStencilState = DepthStencilState.Default;
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GraphicsDevice.BlendState = BlendState.Opaque;
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Deferred_GBufferEffect.HardwareInstancingEnabled = true;
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Deferred_GBufferEffect.Albedo = drawable.Albedo;
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Deferred_GBufferEffect.Metallic = drawable.Metallic;
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Deferred_GBufferEffect.Roughness = drawable.Roughness;
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Deferred_GBufferEffect.NumTextureRows = drawable.NumTextureRows;
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Deferred_GBufferEffect.NumTextureColumns = drawable.NumTextureColumns;
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Deferred_GBufferEffect.AlbedoTexture = drawable.AlbedoTexture;
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Deferred_GBufferEffect.NormalTexture = drawable.NormalTexture;
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Deferred_GBufferEffect.MetallicRoughnessTexture = drawable.MetallicRoughnessTexture;
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Deferred_GBufferEffect.View = camera.View;
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Deferred_GBufferEffect.Projection = camera.Projection;
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RenderInstanced(
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GraphicsDevice,
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drawable,
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instanceVertexBuffer,
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numInstances,
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Deferred_GBufferEffect
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);
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// re-render to get depth
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GraphicsDevice.SetRenderTargets(depthBuffer);
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SimpleDepthEffectInstanced.View = camera.View;
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SimpleDepthEffectInstanced.Projection = camera.Projection;
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RenderInstanced(
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GraphicsDevice,
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drawable,
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instanceVertexBuffer,
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numInstances,
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SimpleDepthEffectInstanced
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);
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}
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public void RenderGBufferIndexed<T>(
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RenderTargetBinding[] gBuffer,
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PerspectiveCamera camera,
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IEnumerable<(T, Matrix)> drawableTransforms
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) where T : ICullable, IIndexDrawable, IGBufferDrawable {
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GraphicsDevice.SetRenderTargets(gBuffer);
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GraphicsDevice.DepthStencilState = DepthStencilState.Default;
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GraphicsDevice.BlendState = BlendState.Opaque;
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Deferred_GBufferEffect.HardwareInstancingEnabled = false;
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Deferred_GBufferEffect.View = camera.View;
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Deferred_GBufferEffect.Projection = camera.Projection;
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var boundingFrustum = new BoundingFrustum(camera.View * camera.Projection);
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foreach (var (drawable, transform) in FrustumCull(boundingFrustum, drawableTransforms))
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{
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Deferred_GBufferEffect.World = transform;
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Deferred_GBufferEffect.HardwareInstancingEnabled = false;
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Deferred_GBufferEffect.Albedo = drawable.Albedo;
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Deferred_GBufferEffect.Metallic = drawable.Metallic;
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Deferred_GBufferEffect.Roughness = drawable.Roughness;
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Deferred_GBufferEffect.AlbedoTexture = drawable.AlbedoTexture;
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Deferred_GBufferEffect.NormalTexture = drawable.NormalTexture;
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Deferred_GBufferEffect.MetallicRoughnessTexture = drawable.MetallicRoughnessTexture;
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RenderIndexed(GraphicsDevice, drawable, Deferred_GBufferEffect);
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}
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}
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public void RenderAmbientLight(
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RenderTarget2D renderTarget,
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Texture2D gPosition,
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Texture2D gAlbedo,
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AmbientLight ambientLight
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) {
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GraphicsDevice.SetRenderTarget(renderTarget);
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GraphicsDevice.BlendState = BlendState.Opaque;
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GraphicsDevice.DepthStencilState = DepthStencilState.DepthRead;
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DeferredAmbientLightEffect.GPosition = gPosition;
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DeferredAmbientLightEffect.GAlbedo = gAlbedo;
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DeferredAmbientLightEffect.AmbientColor = ambientLight.Color.ToVector3();
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RenderFullscreenEffect(DeferredAmbientLightEffect);
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}
|
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|
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public void RenderPointLight(
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RenderTarget2D renderTarget,
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Texture2D gPosition,
|
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Texture2D gAlbedo,
|
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Texture2D gNormal,
|
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Texture2D gMetallicRoughness,
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TextureCube shadowMap,
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PerspectiveCamera camera,
|
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PointLight pointLight
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) {
|
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GraphicsDevice.SetRenderTarget(renderTarget);
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if (Vector3.Distance(camera.Position, pointLight.Position) < pointLight.EffectiveRadius)
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{
|
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GraphicsDevice.RasterizerState = RasterizerState.CullClockwise;
|
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}
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else
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{
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GraphicsDevice.RasterizerState = RasterizerState.CullCounterClockwise;
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}
|
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|
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GraphicsDevice.DepthStencilState = DepthStencilState.None;
|
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GraphicsDevice.BlendState = BlendState.Additive;
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DeferredPointLightEffect.GPosition = gPosition;
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DeferredPointLightEffect.GAlbedo = gAlbedo;
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DeferredPointLightEffect.GNormal = gNormal;
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DeferredPointLightEffect.GMetallicRoughness = gMetallicRoughness;
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DeferredPointLightEffect.ShadowMap = shadowMap;
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|
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DeferredPointLightEffect.EyePosition = camera.Position;
|
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|
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DeferredPointLightEffect.PointLightPosition = pointLight.Position;
|
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DeferredPointLightEffect.PointLightColor =
|
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pointLight.Color.ToVector3() * pointLight.Intensity;
|
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|
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DeferredPointLightEffect.FarPlane = 25f; // FIXME: magic value
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|
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DeferredPointLightEffect.World =
|
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Matrix.CreateScale(pointLight.EffectiveRadius) *
|
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Matrix.CreateTranslation(pointLight.Position);
|
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DeferredPointLightEffect.View = camera.View;
|
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DeferredPointLightEffect.Projection = camera.Projection;
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RenderIndexed(
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GraphicsDevice,
|
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UnitSphere.Meshes[0].MeshParts[0],
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DeferredPointLightEffect
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);
|
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}
|
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|
|
public void RenderDirectionalLight(
|
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RenderTarget2D renderTarget,
|
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Texture2D gPosition,
|
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Texture2D gAlbedo,
|
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Texture2D gNormal,
|
|
Texture2D gMetallicRoughness,
|
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DirectionalShadowMapData shadowMapData,
|
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PerspectiveCamera camera,
|
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DirectionalLight directionalLight
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) {
|
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GraphicsDevice.SetRenderTarget(renderTarget);
|
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GraphicsDevice.RasterizerState = RasterizerState.CullCounterClockwise;
|
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GraphicsDevice.DepthStencilState = DepthStencilState.DepthRead;
|
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GraphicsDevice.BlendState = BlendState.Additive;
|
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|
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DeferredDirectionalLightEffect.GPosition = gPosition;
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DeferredDirectionalLightEffect.GAlbedo = gAlbedo;
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DeferredDirectionalLightEffect.GNormal = gNormal;
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DeferredDirectionalLightEffect.GMetallicRoughness = gMetallicRoughness;
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|
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DeferredDirectionalLightEffect.ShadowMapSize = shadowMapData.ShadowMapSize;
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|
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DeferredDirectionalLightEffect.ShadowMapOne = shadowMapData.ShadowMaps[0];
|
|
DeferredDirectionalLightEffect.LightSpaceMatrixOne = shadowMapData.LightSpaceViews[0] * shadowMapData.LightSpaceProjections[0];
|
|
DeferredDirectionalLightEffect.CascadeFarPlanes[0] = shadowMapData.CascadeFarPlanes[0];
|
|
|
|
if (shadowMapData.NumShadowCascades > 1)
|
|
{
|
|
DeferredDirectionalLightEffect.ShadowMapTwo = shadowMapData.ShadowMaps[1];
|
|
DeferredDirectionalLightEffect.LightSpaceMatrixTwo = shadowMapData.LightSpaceViews[1] * shadowMapData.LightSpaceProjections[1];
|
|
DeferredDirectionalLightEffect.CascadeFarPlanes[1] = shadowMapData.CascadeFarPlanes[1];
|
|
}
|
|
if (shadowMapData.NumShadowCascades > 2)
|
|
{
|
|
DeferredDirectionalLightEffect.ShadowMapThree = shadowMapData.ShadowMaps[2];
|
|
DeferredDirectionalLightEffect.LightSpaceMatrixThree = shadowMapData.LightSpaceViews[2] * shadowMapData.LightSpaceProjections[2];
|
|
DeferredDirectionalLightEffect.CascadeFarPlanes[2] = shadowMapData.CascadeFarPlanes[2];
|
|
}
|
|
if (shadowMapData.NumShadowCascades > 3)
|
|
{
|
|
DeferredDirectionalLightEffect.ShadowMapFour = shadowMapData.ShadowMaps[3];
|
|
DeferredDirectionalLightEffect.LightSpaceMatrixFour = shadowMapData.LightSpaceViews[3] * shadowMapData.LightSpaceProjections[3];
|
|
DeferredDirectionalLightEffect.CascadeFarPlanes[3] = shadowMapData.CascadeFarPlanes[3];
|
|
}
|
|
|
|
DeferredDirectionalLightEffect.DirectionalLightDirection = directionalLight.Direction;
|
|
DeferredDirectionalLightEffect.DirectionalLightColor =
|
|
directionalLight.Color.ToVector3() * directionalLight.Intensity;
|
|
|
|
DeferredDirectionalLightEffect.ViewMatrix = camera.View;
|
|
DeferredDirectionalLightEffect.EyePosition = camera.Position;
|
|
|
|
RenderFullscreenEffect(DeferredDirectionalLightEffect);
|
|
}
|
|
|
|
public void RenderDirectionalLightToon(
|
|
RenderTarget2D renderTarget,
|
|
Texture2D gPosition,
|
|
Texture2D gAlbedo,
|
|
Texture2D gNormal,
|
|
Texture2D gMetallicRoughness,
|
|
DirectionalShadowMapData shadowMapData,
|
|
PerspectiveCamera camera,
|
|
DirectionalLight directionalLight,
|
|
bool ditheredShadows
|
|
) {
|
|
GraphicsDevice.SetRenderTarget(renderTarget);
|
|
GraphicsDevice.DepthStencilState = DepthStencilState.DepthRead;
|
|
GraphicsDevice.BlendState = BlendState.Additive;
|
|
|
|
Deferred_ToonEffect.GPosition = gPosition;
|
|
Deferred_ToonEffect.GAlbedo = gAlbedo;
|
|
Deferred_ToonEffect.GNormal = gNormal;
|
|
Deferred_ToonEffect.GMetallicRoughness = gMetallicRoughness;
|
|
|
|
Deferred_ToonEffect.DitheredShadows = ditheredShadows;
|
|
|
|
Deferred_ToonEffect.EyePosition = camera.Position;
|
|
|
|
Deferred_ToonEffect.DirectionalLightDirection = directionalLight.Direction;
|
|
Deferred_ToonEffect.DirectionalLightColor =
|
|
directionalLight.Color.ToVector3() * directionalLight.Intensity;
|
|
|
|
Deferred_ToonEffect.ShadowMapOne = shadowMapData.ShadowMaps[0];
|
|
Deferred_ToonEffect.LightSpaceMatrixOne = shadowMapData.LightSpaceViews[0] * shadowMapData.LightSpaceProjections[0];
|
|
|
|
if (shadowMapData.NumShadowCascades > 1)
|
|
{
|
|
Deferred_ToonEffect.ShadowMapTwo = shadowMapData.ShadowMaps[1];
|
|
Deferred_ToonEffect.LightSpaceMatrixTwo = shadowMapData.LightSpaceViews[1] * shadowMapData.LightSpaceProjections[1];
|
|
}
|
|
if (shadowMapData.NumShadowCascades > 2)
|
|
{
|
|
Deferred_ToonEffect.ShadowMapThree = shadowMapData.ShadowMaps[2];
|
|
Deferred_ToonEffect.LightSpaceMatrixThree = shadowMapData.LightSpaceViews[1] * shadowMapData.LightSpaceProjections[2];
|
|
}
|
|
if (shadowMapData.NumShadowCascades > 3)
|
|
{
|
|
Deferred_ToonEffect.ShadowMapFour = shadowMapData.ShadowMaps[3];
|
|
Deferred_ToonEffect.LightSpaceMatrixFour = shadowMapData.LightSpaceViews[2] * shadowMapData.LightSpaceProjections[3];
|
|
}
|
|
|
|
Deferred_ToonEffect.ViewMatrix = camera.View;
|
|
|
|
RenderFullscreenEffect(Deferred_ToonEffect);
|
|
}
|
|
|
|
public void PrepareDirectionalShadowData(
|
|
DirectionalShadowMapData shadowMapData,
|
|
PerspectiveCamera camera,
|
|
DirectionalLight directionalLight
|
|
) {
|
|
var previousFarPlane = camera.NearPlane;
|
|
for (var i = 0; i < shadowMapData.NumShadowCascades; i++)
|
|
{
|
|
var farPlane = camera.FarPlane / (MathHelper.Max((shadowMapData.NumShadowCascades - i - 1) * 2f, 1f));
|
|
|
|
// divide the view frustum
|
|
var shadowCamera = new PerspectiveCamera(
|
|
camera.Position,
|
|
camera.Forward,
|
|
camera.Up,
|
|
camera.FieldOfView,
|
|
camera.AspectRatio,
|
|
previousFarPlane,
|
|
farPlane
|
|
);
|
|
|
|
PrepareDirectionalShadowCascade(
|
|
shadowMapData,
|
|
i,
|
|
shadowCamera,
|
|
directionalLight
|
|
);
|
|
|
|
shadowMapData.CascadeFarPlanes[i] = farPlane;
|
|
previousFarPlane = farPlane;
|
|
}
|
|
}
|
|
|
|
private void PrepareDirectionalShadowCascade(
|
|
DirectionalShadowMapData shadowMapData,
|
|
int shadowCascadeIndex,
|
|
PerspectiveCamera shadowCamera,
|
|
DirectionalLight directionalLight
|
|
) {
|
|
var cameraBoundingFrustum = new BoundingFrustum(shadowCamera.View * shadowCamera.Projection);
|
|
Vector3[] frustumCorners = cameraBoundingFrustum.GetCorners();
|
|
|
|
Vector3 frustumCenter = Vector3.Zero;
|
|
for (var i = 0; i < frustumCorners.Length; i++)
|
|
{
|
|
frustumCenter += frustumCorners[i];
|
|
}
|
|
frustumCenter /= 8f;
|
|
|
|
var lightView = Matrix.CreateLookAt(frustumCenter + directionalLight.Direction, frustumCenter, Vector3.Backward);
|
|
|
|
for (var i = 0; i < frustumCorners.Length; i++)
|
|
{
|
|
frustumCorners[i] = Vector3.Transform(frustumCorners[i], lightView);
|
|
}
|
|
|
|
BoundingBox lightBox = BoundingBox.CreateFromPoints(frustumCorners);
|
|
|
|
shadowMapData.LightSpaceViews[shadowCascadeIndex] = lightView;
|
|
shadowMapData.LightSpaceProjections[shadowCascadeIndex] = Matrix.CreateOrthographicOffCenter(
|
|
lightBox.Min.X,
|
|
lightBox.Max.X,
|
|
lightBox.Min.Y,
|
|
lightBox.Max.Y,
|
|
-lightBox.Max.Z - 10f, // TODO: near clip plane needs scene AABB info to get rid of this magic value
|
|
-lightBox.Min.Z
|
|
);
|
|
}
|
|
|
|
public void RenderDirectionalShadowsIndexed<T>(
|
|
DirectionalShadowMapData shadowMapData,
|
|
IEnumerable<(T, Matrix)> drawableTransforms
|
|
) where T : ICullable, IIndexDrawable {
|
|
// render the individual shadow cascades
|
|
for (var i = 0; i < shadowMapData.NumShadowCascades; i++)
|
|
{
|
|
RenderDirectionalShadowMapIndexed(
|
|
shadowMapData,
|
|
i,
|
|
drawableTransforms
|
|
);
|
|
}
|
|
}
|
|
|
|
private void RenderDirectionalShadowMapIndexed<T>(
|
|
DirectionalShadowMapData shadowMapData,
|
|
int shadowCascadeIndex,
|
|
IEnumerable<(T, Matrix)> drawableTransforms
|
|
) where T : ICullable, IIndexDrawable {
|
|
GraphicsDevice.SetRenderTarget(shadowMapData.ShadowMaps[shadowCascadeIndex]);
|
|
GraphicsDevice.DepthStencilState = DepthStencilState.Default;
|
|
GraphicsDevice.BlendState = BlendState.Opaque;
|
|
|
|
SimpleDepthEffect.View = shadowMapData.LightSpaceViews[shadowCascadeIndex];
|
|
SimpleDepthEffect.Projection = shadowMapData.LightSpaceProjections[shadowCascadeIndex];
|
|
|
|
CullAndRenderIndexed(
|
|
GraphicsDevice,
|
|
new BoundingFrustum(SimpleDepthEffect.View * SimpleDepthEffect.Projection),
|
|
drawableTransforms,
|
|
SimpleDepthEffect
|
|
);
|
|
}
|
|
|
|
public void RenderDirectionalShadowsInstanced<T>(
|
|
DirectionalShadowMapData shadowMapData,
|
|
T drawable,
|
|
VertexBuffer instanceVertexBuffer,
|
|
int numInstances
|
|
) where T : IIndexDrawable
|
|
{
|
|
// render the individual shadow cascades
|
|
for (var i = 0; i < shadowMapData.NumShadowCascades; i++)
|
|
{
|
|
RenderDirectionalShadowMapInstanced(
|
|
shadowMapData,
|
|
i,
|
|
drawable,
|
|
instanceVertexBuffer,
|
|
numInstances
|
|
);
|
|
}
|
|
}
|
|
|
|
private void RenderDirectionalShadowMapInstanced<T>(
|
|
DirectionalShadowMapData shadowMapData,
|
|
int shadowCascadeIndex,
|
|
T drawable,
|
|
VertexBuffer instanceVertexBuffer,
|
|
int numInstances
|
|
) where T : IIndexDrawable
|
|
{
|
|
GraphicsDevice.SetRenderTarget(shadowMapData.ShadowMaps[shadowCascadeIndex]);
|
|
GraphicsDevice.DepthStencilState = DepthStencilState.Default;
|
|
GraphicsDevice.BlendState = BlendState.Opaque;
|
|
|
|
SimpleDepthEffectInstanced.View = shadowMapData.LightSpaceViews[shadowCascadeIndex];
|
|
SimpleDepthEffectInstanced.Projection = shadowMapData.LightSpaceProjections[shadowCascadeIndex];
|
|
|
|
RenderInstanced(
|
|
GraphicsDevice,
|
|
drawable,
|
|
instanceVertexBuffer,
|
|
numInstances,
|
|
SimpleDepthEffectInstanced
|
|
);
|
|
}
|
|
|
|
public void RenderPointShadowMapIndexed<T>(
|
|
RenderTargetCube pointShadowCubeMap,
|
|
PerspectiveCamera camera,
|
|
IEnumerable<(T, Matrix)> modelTransforms,
|
|
PointLight pointLight
|
|
) where T : ICullable, IIndexDrawable {
|
|
GraphicsDevice.DepthStencilState = DepthStencilState.Default;
|
|
GraphicsDevice.BlendState = BlendState.Opaque;
|
|
|
|
foreach (CubeMapFace face in Enum.GetValues(typeof(CubeMapFace)))
|
|
{
|
|
GraphicsDevice.SetRenderTarget(pointShadowCubeMap, face);
|
|
|
|
Vector3 targetDirection;
|
|
Vector3 targetUpDirection;
|
|
switch(face)
|
|
{
|
|
case CubeMapFace.PositiveX:
|
|
targetDirection = Vector3.Right;
|
|
targetUpDirection = Vector3.Up;
|
|
break;
|
|
|
|
case CubeMapFace.NegativeX:
|
|
targetDirection = Vector3.Left;
|
|
targetUpDirection = Vector3.Up;
|
|
break;
|
|
|
|
case CubeMapFace.PositiveY:
|
|
targetDirection = Vector3.Up;
|
|
targetUpDirection = Vector3.Forward;
|
|
break;
|
|
|
|
case CubeMapFace.NegativeY:
|
|
targetDirection = Vector3.Down;
|
|
targetUpDirection = Vector3.Backward;
|
|
break;
|
|
|
|
case CubeMapFace.PositiveZ:
|
|
targetDirection = Vector3.Backward;
|
|
targetUpDirection = Vector3.Up;
|
|
break;
|
|
|
|
case CubeMapFace.NegativeZ:
|
|
targetDirection = Vector3.Forward;
|
|
targetUpDirection = Vector3.Up;
|
|
break;
|
|
|
|
default:
|
|
targetDirection = Vector3.Right;
|
|
targetUpDirection = Vector3.Up;
|
|
break;
|
|
}
|
|
|
|
LinearDepthEffect.View = Matrix.CreateLookAt(
|
|
pointLight.Position,
|
|
pointLight.Position + targetDirection,
|
|
targetUpDirection
|
|
);
|
|
LinearDepthEffect.Projection = Matrix.CreatePerspectiveFieldOfView(
|
|
MathHelper.PiOver2,
|
|
1,
|
|
0.1f,
|
|
25f // FIXME: magic value
|
|
);
|
|
LinearDepthEffect.FarPlane = 25f;
|
|
|
|
LinearDepthEffect.LightPosition = pointLight.Position;
|
|
|
|
CullAndRenderIndexed(
|
|
GraphicsDevice,
|
|
new BoundingFrustum(LinearDepthEffect.View * LinearDepthEffect.Projection),
|
|
modelTransforms,
|
|
LinearDepthEffect
|
|
);
|
|
}
|
|
}
|
|
|
|
public void RenderPointShadowMapInstanced<T>(
|
|
RenderTargetCube pointShadowCubeMap,
|
|
T drawable,
|
|
VertexBuffer instanceVertexBuffer,
|
|
int numInstances,
|
|
PointLight pointLight
|
|
) where T : ICullable, IIndexDrawable
|
|
{
|
|
GraphicsDevice.DepthStencilState = DepthStencilState.Default;
|
|
GraphicsDevice.BlendState = BlendState.Opaque;
|
|
|
|
foreach (CubeMapFace face in Enum.GetValues(typeof(CubeMapFace)))
|
|
{
|
|
GraphicsDevice.SetRenderTarget(pointShadowCubeMap, face);
|
|
|
|
Vector3 targetDirection;
|
|
Vector3 targetUpDirection;
|
|
switch(face)
|
|
{
|
|
case CubeMapFace.PositiveX:
|
|
targetDirection = Vector3.Right;
|
|
targetUpDirection = Vector3.Up;
|
|
break;
|
|
|
|
case CubeMapFace.NegativeX:
|
|
targetDirection = Vector3.Left;
|
|
targetUpDirection = Vector3.Up;
|
|
break;
|
|
|
|
case CubeMapFace.PositiveY:
|
|
targetDirection = Vector3.Up;
|
|
targetUpDirection = Vector3.Forward;
|
|
break;
|
|
|
|
case CubeMapFace.NegativeY:
|
|
targetDirection = Vector3.Down;
|
|
targetUpDirection = Vector3.Backward;
|
|
break;
|
|
|
|
case CubeMapFace.PositiveZ:
|
|
targetDirection = Vector3.Backward;
|
|
targetUpDirection = Vector3.Up;
|
|
break;
|
|
|
|
case CubeMapFace.NegativeZ:
|
|
targetDirection = Vector3.Forward;
|
|
targetUpDirection = Vector3.Up;
|
|
break;
|
|
|
|
default:
|
|
targetDirection = Vector3.Right;
|
|
targetUpDirection = Vector3.Up;
|
|
break;
|
|
}
|
|
|
|
LinearDepthEffectInstanced.View = Matrix.CreateLookAt(
|
|
pointLight.Position,
|
|
pointLight.Position + targetDirection,
|
|
targetUpDirection
|
|
);
|
|
LinearDepthEffectInstanced.Projection = Matrix.CreatePerspectiveFieldOfView(
|
|
MathHelper.PiOver2,
|
|
1,
|
|
0.1f,
|
|
25f // FIXME: magic value
|
|
);
|
|
|
|
LinearDepthEffectInstanced.FarPlane = 25f;
|
|
LinearDepthEffectInstanced.LightPosition = pointLight.Position;
|
|
|
|
RenderInstanced(
|
|
GraphicsDevice,
|
|
drawable,
|
|
instanceVertexBuffer,
|
|
numInstances,
|
|
LinearDepthEffectInstanced
|
|
);
|
|
}
|
|
}
|
|
|
|
private static IEnumerable<(T, Matrix)> FrustumCull<T>(
|
|
BoundingFrustum boundingFrustum,
|
|
IEnumerable<(T, Matrix)> cullableTransforms
|
|
) where T : ICullable {
|
|
foreach (var (cullable, transform) in cullableTransforms)
|
|
{
|
|
var boundingBox = TransformedBoundingBox(cullable.BoundingBox, transform);
|
|
var containment = boundingFrustum.Contains(boundingBox);
|
|
if (containment != ContainmentType.Disjoint)
|
|
{
|
|
yield return (cullable, transform);
|
|
}
|
|
}
|
|
}
|
|
|
|
private static IEnumerable<Matrix> FrustumCull<T>(
|
|
BoundingFrustum boundingFrustum,
|
|
T cullable,
|
|
IEnumerable<Matrix> transforms
|
|
) where T : ICullable
|
|
{
|
|
foreach (var transform in transforms)
|
|
{
|
|
var boundingBox = TransformedBoundingBox(cullable.BoundingBox, transform);
|
|
var containment = boundingFrustum.Contains(boundingBox);
|
|
if (containment != ContainmentType.Disjoint)
|
|
{
|
|
yield return transform;
|
|
}
|
|
}
|
|
}
|
|
|
|
private static BoundingBox TransformedBoundingBox(BoundingBox boundingBox, Matrix matrix)
|
|
{
|
|
var center = (boundingBox.Min + boundingBox.Max) / 2f;
|
|
var extent = (boundingBox.Max - boundingBox.Min) / 2f;
|
|
|
|
var newCenter = Vector3.Transform(center, matrix);
|
|
var newExtent = Vector3.TransformNormal(extent, AbsoluteMatrix(matrix));
|
|
|
|
return new BoundingBox(newCenter - newExtent, newCenter + newExtent);
|
|
}
|
|
|
|
private static Matrix AbsoluteMatrix(Matrix matrix)
|
|
{
|
|
return new Matrix(
|
|
Math.Abs(matrix.M11), Math.Abs(matrix.M12), Math.Abs(matrix.M13), Math.Abs(matrix.M14),
|
|
Math.Abs(matrix.M21), Math.Abs(matrix.M22), Math.Abs(matrix.M23), Math.Abs(matrix.M24),
|
|
Math.Abs(matrix.M31), Math.Abs(matrix.M32), Math.Abs(matrix.M33), Math.Abs(matrix.M34),
|
|
Math.Abs(matrix.M41), Math.Abs(matrix.M42), Math.Abs(matrix.M43), Math.Abs(matrix.M44)
|
|
);
|
|
}
|
|
}
|
|
}
|