/* Silkworm - Verlet cloth physics in C
 *
 * Copyright (c) 2021 Evan Hemsley
 *
 * This software is provided 'as-is', without any express or implied warranty.
 * In no event will the authors be held liable for any damages arising from
 * the use of this software.
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you must not
 * claim that you wrote the original software. If you use this software in a
 * product, an acknowledgment in the product documentation would be
 * appreciated but is not required.
 *
 * 2. Altered source versions must be plainly marked as such, and must not be
 * misrepresented as being the original software.
 *
 * 3. This notice may not be removed or altered from any source distribution.
 *
 * Evan "cosmonaut" Hemsley <evan@moonside.games>
 *
 */

#ifndef SILKWORM_H
#define SILKWORM_H

#include <math.h>
#include <stdbool.h>
#include <stdint.h>

#ifdef _WIN32
#define SILKWORMAPI __declspec(dllexport)
#define SILKWORMCALL __cdecl
#else
#define SILKWORMAPI
#define SILKWORMCALL
#endif

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

/* Version API */

#define SILKWORM_ABI_VERSION	 0
#define SILKWORM_MAJOR_VERSION   0
#define SILKWORM_MINOR_VERSION	1
#define SILKWORM_PATCH_VERSION	0
#define SILKWORM_COMPILED_VERSION ( \
	(SILKWORM_ABI_VERSION * 100 * 100 * 100) + \
	(SILKWORM_MAJOR_VERSION * 100 * 100) + \
	(SILKWORM_MINOR_VERSION * 100) + \
	(SILKWORM_PATCH_VERSION) \
)

SILKWORMAPI void Silkworm_Init();
SILKWORMAPI void Silkworm_Update(double delta);
SILKWORMAPI void Silkworm_ApplyWind(double xSpeed, double ySpeed);

SILKWORMAPI void Silkworm_SetBuffer(const char* bufferId);

SILKWORMAPI double Silkworm_CreateNode(double xPosition, double yPosition, double mass, double friction, double radius, double pushFactor, double windFactor);

SILKWORMAPI void Silkworm_NodeSetDestroyable(double nodeId);

SILKWORMAPI double Silkworm_CreateLink(double aId, double bId, double distance, double tearThreshold);

SILKWORMAPI double Silkworm_CreateCloth(double xPosition, double yPosition, double width, double height, double mass, double friction, double windFactor, double tearThreshold);
SILKWORMAPI double Silkworm_ClothHorizontalNodeCount(double clothId);
SILKWORMAPI double Silkworm_ClothVerticalNodeCount(double clothId);
SILKWORMAPI void Silkworm_ClothNodePin(double clothId, double i, double j);
SILKWORMAPI void Silkworm_ClothNodeUnpin(double clothId, double i, double j);
SILKWORMAPI void Silkworm_ClothNodeDestroy(double clothId, double i, double j);
SILKWORMAPI void Silkworm_ClothFillNodeDataBuffer(double clothId);
SILKWORMAPI void Silkworm_DestroyCloth(double clothId);

SILKWORMAPI double Silkworm_ClothFillTriangleBuffer(double clothId, double leftUV, double widthUV, double topUV, double heightUV);

SILKWORMAPI double Silkworm_RopeCreate(double xPosition, double yPosition, double mass, double friction, double windFactor, double pushFactor, double tearThreshold);
SILKWORMAPI double Silkworm_RopeAddNode(double ropeId, double xPosition, double yPosition, double length);
SILKWORMAPI double Silkworm_RopeVerticalLength(double ropeId);
SILKWORMAPI double Silkworm_RopeNearestX(double ropeId, double xPosition, double yPosition);
SILKWORMAPI double Silkworm_RopeNearestY(double ropeId, double xPosition, double yPosition);
SILKWORMAPI double Silkworm_RopeNodeCount(double ropeId);
SILKWORMAPI double Silkworm_RopeNodeXPosition(double ropeId, double nodeIndex);
SILKWORMAPI double Silkworm_RopeNodeYPosition(double ropeId, double nodeIndex);
SILKWORMAPI double Silkworm_RopeNodeXSpeed(double ropeId, double nodeIndex);
SILKWORMAPI double Silkworm_RopeNodeYSpeed(double ropeId, double nodeIndex);
SILKWORMAPI void Silkworm_UnpinRope(double ropeId);
SILKWORMAPI void Silkworm_DeleteEndNode(double ropeId);
SILKWORMAPI void Silkworm_RopeDestroy(double ropeId);
SILKWORMAPI double Silkworm_RopeRequiredBufferSize(double ropeId);
SILKWORMAPI double Silkworm_RopeFillBuffer(double ropeId, double width, double leftUV, double widthUV, double topUV, double heightUV);

SILKWORMAPI double Silkworm_GetEditorBufferRequiredSize();
SILKWORMAPI double Silkworm_FillEditorBuffer();

SILKWORMAPI void Silkworm_DestroyNode(double nodeId);

SILKWORMAPI void Silkworm_PinNodesInRadius(double x, double y, double radius);
SILKWORMAPI void Silkworm_UnpinNodesInRadius(double x, double y, double radius);
SILKWORMAPI void Silkworm_PushNodesInRadius(double x, double y, double radius, double xDirection, double yDirection);
SILKWORMAPI void Silkworm_DestroyNodesInRadius(double x, double y, double radius);
SILKWORMAPI double Silkworm_DestroyClothInRadius(double x, double y, double radius);

SILKWORMAPI double Silkworm_NodeDestructionDataBufferRequiredSize();
SILKWORMAPI double Silkworm_FillNodeDestructionDataBuffer();

SILKWORMAPI double Silkworm_LinkDestructionDataBufferRequiredSize();
SILKWORMAPI double Silkworm_FillLinkDestructionDataBuffer();

SILKWORMAPI void Silkworm_PerformDestroys();
SILKWORMAPI void Silkworm_ClearAll();
SILKWORMAPI void Silkworm_Finish();

#endif /* SILKWORM_H */