initial commit

2021-10-04 18:10:25 -07:00 · 2021-10-04 18:10:25 -07:00 · e73ce84eaa
commit e73ce84eaa
7 changed files with 514 additions and 0 deletions
--- a/.gitignore
+++ b/.gitignore
@ -0,0 +1 @@
+*.vs
--- a/src/snowstorm.c
+++ b/src/snowstorm.c
@ -0,0 +1,200 @@
+/* Snowstorm - Particle effects 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>
+ *
+ */
+
+#include "Snowstorm.h"
+
+#include <stdlib.h>
+#include <time.h>
+
+typedef struct Snowstorm_Vector2
+{
+	float x;
+	float y;
+} Snowstorm_Vector2;
+
+static inline Snowstorm_Vector2 Vector2_Rotate(Snowstorm_Vector2 vector, float angle)
+{
+	Snowstorm_Vector2 rotated;
+	rotated.x = vector.x * cosf(angle) - vector.y * sinf(angle);
+	rotated.y = vector.x * sinf(angle) + vector.y * cosf(angle);
+	return rotated;
+}
+
+static inline float Vector2_Magnitude(Snowstorm_Vector2 vector)
+{
+	return sqrtf(vector.x * vector.x + vector.y * vector.y);
+}
+
+static inline Snowstorm_Vector2 Vector2_Normalize(Snowstorm_Vector2 vector)
+{
+	float length = Vector2_Magnitude(vector);
+
+	Snowstorm_Vector2 normalized;
+	normalized.x = vector.x / length;
+	normalized.y = vector.y / length;
+
+	return normalized;
+}
+
+typedef struct Snowstorm_Particle
+{
+	float time;
+	Snowstorm_Vector2 position;
+	Snowstorm_Vector2 velocity;
+	Snowstorm_Vector2 scale;
+	float size;
+	float rotation;
+	float spin;
+
+	float directionVariance;
+	float speedVariance;
+	Snowstorm_Vector2 catchup;
+} Snowstorm_Particle;
+
+typedef struct Snowstorm_Context
+{
+	Snowstorm_Particle** particles;
+	uint32_t particleCount;
+
+	Snowstorm_Vector2 wind;
+
+	float directionChaos;
+	float speedChaos;
+
+	float leftBound;
+	float topBound;
+	float rightBound;
+	float bottomBound;
+} Snowstorm_Context;
+
+static Snowstorm_Context* context = NULL;
+
+static inline float Approach(float value, float target, float maxChange)
+{
+	return value + min(max(target - value, -maxChange), maxChange);
+}
+
+static inline float WrapWithOvershoot(float value, float min, float max)
+{
+	if (value < min)
+	{
+		value = max - (min - value);
+	}
+	if (value > max)
+	{
+		value = min + (value - max);
+	}
+	return value;
+}
+
+static inline float Random(float a)
+{
+	return (float)rand() / (float)(RAND_MAX / a);
+}
+
+static inline float RandomRange(float min, float max)
+{
+	return Random(max - min) + min;
+}
+
+void Snowstorm_Init()
+{
+	srand((unsigned int)time(NULL));
+
+	context = malloc(sizeof(Snowstorm_Context));
+
+	context->particles = NULL;
+	context->particleCount = 0;
+
+	context->leftBound = -10;
+	context->rightBound = 490;
+	context->topBound = -10;
+	context->bottomBound = 280;
+
+	context->wind.x = 0;
+	context->wind.y = 0;
+
+	context->directionChaos = 0;
+	context->speedChaos = 0;
+}
+
+void Snowstorm_Update(double delta)
+{
+	uint32_t i;
+	Snowstorm_Particle* particle = NULL;
+
+	float deltaTime = (float)delta;
+
+	for (i = 0; i < context->particleCount; i += 1)
+	{
+		particle = context->particles[i];
+
+		if (particle != NULL)
+		{
+			particle->time += deltaTime;
+
+			float speed = Vector2_Magnitude(particle->velocity);
+			float rotation = sinf(particle->time / (speed * 100)) * particle->directionVariance;
+
+			float windSpeed = Vector2_Magnitude(context->wind);
+			Snowstorm_Vector2 wind = Vector2_Normalize(context->wind);
+			wind.x *= (windSpeed + particle->speedVariance);
+			wind.y *= (windSpeed + particle->speedVariance);
+
+			wind = Vector2_Rotate(wind, rotation);
+
+			particle->velocity.x = Approach(particle->velocity.x, wind.x, particle->catchup.x);
+			particle->velocity.y = Approach(particle->velocity.y, wind.y, particle->catchup.y);
+
+			particle->position.x = WrapWithOvershoot(particle->position.x + particle->velocity.x, context->leftBound, context->rightBound);
+			particle->position.y = WrapWithOvershoot(particle->position.y + particle->velocity.y, context->topBound, context->bottomBound);
+
+			particle->scale.y = particle->size * sinf(particle->time / 10);
+
+			particle->rotation += particle->spin;
+		}
+	}
+}
+
+void Snowstorm_ApplyWind(double xSpeed, double ySpeed)
+{
+	uint32_t i;
+	Snowstorm_Particle* particle;
+
+	for (i = 0; i < context->particleCount; i += 1)
+	{
+		particle = context->particles[i];
+
+		if (particle != NULL)
+		{
+			particle->directionVariance = RandomRange(-context->directionChaos, context->directionChaos);
+			particle->speedVariance = RandomRange(-context->speedChaos, context->speedChaos);
+		}
+	}
+
+	context->wind.x = (float)xSpeed;
+	context->wind.y = (float)ySpeed;
+}
--- a/src/snowstorm.h
+++ b/src/snowstorm.h
@ -0,0 +1,76 @@
+/* Snowstorm - Particle effects 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 SNOWSTORM_H
+#define SNOWSTORM_H
+
+#include <math.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+#ifdef _WIN32
+#define SNOWSTORMAPI __declspec(dllexport)
+#define SNOWSTORMCALL __cdecl
+#else
+#define SNOWSTORMAPI
+#define SNOWSTORMCALL
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/* Version API */
+
+#define SNOWSTORM_ABI_VERSION	 0
+#define SNOWSTORM_MAJOR_VERSION   0
+#define SNOWSTORM_MINOR_VERSION	1
+#define SNOWSTORM_PATCH_VERSION	0
+#define SNOWSTORM_COMPILED_VERSION ( \
+	(SNOWSTORM_ABI_VERSION * 100 * 100 * 100) + \
+	(SNOWSTORM_MAJOR_VERSION * 100 * 100) + \
+	(SNOWSTORM_MINOR_VERSION * 100) + \
+	(SNOWSTORM_PATCH_VERSION) \
+)
+
+SNOWSTORMAPI void Snowstorm_Init();
+SNOWSTORMAPI void Snowstorm_Update(double delta);
+SNOWSTORMAPI void Snowstorm_ApplyWind(double xSpeed, double ySpeed);
+
+SNOWSTORMAPI void Snowstorm_SetBuffer(const char* bufferId);
+
+SNOWSTORMAPI double Snowstorm_RequiredSnowBufferSize();
+SNOWSTORMAPI double Snowstorm_FillSnowBuffer();
+
+SNOWSTORMAPI void Snowstorm_PerformDestroys();
+SNOWSTORMAPI void Snowstorm_ClearAll();
+SNOWSTORMAPI void Snowstorm_Finish();
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* SNOWSTORM_H */
--- a/visualc/Snowstorm.sln
+++ b/visualc/Snowstorm.sln
@ -0,0 +1,31 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.31424.327
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "Snowstorm", "Snowstorm.vcxproj", "{912587C6-EF96-4BF8-BFE8-0E7D8A70D556}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{912587C6-EF96-4BF8-BFE8-0E7D8A70D556}.Debug|x64.ActiveCfg = Debug|x64
+		{912587C6-EF96-4BF8-BFE8-0E7D8A70D556}.Debug|x64.Build.0 = Debug|x64
+		{912587C6-EF96-4BF8-BFE8-0E7D8A70D556}.Debug|x86.ActiveCfg = Debug|Win32
+		{912587C6-EF96-4BF8-BFE8-0E7D8A70D556}.Debug|x86.Build.0 = Debug|Win32
+		{912587C6-EF96-4BF8-BFE8-0E7D8A70D556}.Release|x64.ActiveCfg = Release|x64
+		{912587C6-EF96-4BF8-BFE8-0E7D8A70D556}.Release|x64.Build.0 = Release|x64
+		{912587C6-EF96-4BF8-BFE8-0E7D8A70D556}.Release|x86.ActiveCfg = Release|Win32
+		{912587C6-EF96-4BF8-BFE8-0E7D8A70D556}.Release|x86.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {22EBBD2E-C8D7-4352-BF1B-8188D6AE4259}
+	EndGlobalSection
+EndGlobal
--- a/visualc/Snowstorm.vcxproj
+++ b/visualc/Snowstorm.vcxproj
@ -0,0 +1,169 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <VCProjectVersion>16.0</VCProjectVersion>
+    <Keyword>Win32Proj</Keyword>
+    <ProjectGuid>{912587c6-ef96-4bf8-bfe8-0e7d8a70d556}</ProjectGuid>
+    <RootNamespace>Snowstorm</RootNamespace>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
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+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
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+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
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+    <PlatformToolset>v142</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="Shared">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <LinkIncremental>true</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <LinkIncremental>true</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>WIN32;_DEBUG;SNOWSTORM_EXPORTS;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+      <PrecompiledHeader>Use</PrecompiledHeader>
+      <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <EnableUAC>false</EnableUAC>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>WIN32;NDEBUG;SNOWSTORM_EXPORTS;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+      <PrecompiledHeader>Use</PrecompiledHeader>
+      <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <EnableUAC>false</EnableUAC>
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+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>_DEBUG;SNOWSTORM_EXPORTS;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+      <PrecompiledHeader>Use</PrecompiledHeader>
+      <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <EnableUAC>false</EnableUAC>
+    </Link>
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+      <FunctionLevelLinking>true</FunctionLevelLinking>
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+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>NDEBUG;SNOWSTORM_EXPORTS;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+      <PrecompiledHeader>Use</PrecompiledHeader>
+      <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <EnableUAC>false</EnableUAC>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClInclude Include="framework.h" />
+    <ClInclude Include="pch.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="dllmain.cpp" />
+    <ClCompile Include="pch.cpp">
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Create</PrecompiledHeader>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">Create</PrecompiledHeader>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">Create</PrecompiledHeader>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|x64'">Create</PrecompiledHeader>
+    </ClCompile>
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
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--- a/visualc/Snowstorm.vcxproj.filters
+++ b/visualc/Snowstorm.vcxproj.filters
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--- a/visualc/Snowstorm.vcxproj.user
+++ b/visualc/Snowstorm.vcxproj.user
@ -0,0 +1,4 @@
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