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JohnLudlowJohnLudlow
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Merge pull request #4 from JohnLudlow/shaders-customuniform
Add custom uniform shader example
2 parents 243a6b0 + f0897fe commit 822dddf

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‎Community/Shaders/RaylibCsExamples.Community.Shaders.CustomUniform/Program.cs‎

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/*******************************************************************************************
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*
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* raylib [shaders] example - Apply a postprocessing shader and connect a custom uniform variable
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*
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* NOTE: This example requires raylib OpenGL 3.3 or ES2 versions for shaders support,
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* OpenGL 1.1 does not support shaders, recompile raylib to OpenGL 3.3 version.
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*
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* NOTE: Shaders used in this example are #version 330 (OpenGL 3.3), to test this example
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* on OpenGL ES 2.0 platforms (Android, Raspberry Pi, HTML5), use #version 100 shaders
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* raylib comes with shaders ready for both versions, check raylib/shaders install folder
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*
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* This example has been created using raylib 1.3 (www.raylib.com)
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* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
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*
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* Copyright (c) 2015 Ramon Santamaria (@raysan5)
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*
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********************************************************************************************/
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using System.Diagnostics;
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using System.Numerics;
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using Raylib_cs;
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namespace RaylibCsExamples.Community.Shaders.CustomUniform;
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public class CustomUniform
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{
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public static int Main()
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{
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// Initialization
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//--------------------------------------------------------------------------------------
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const int screenWidth = 1600;
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const int screenHeight = 900;
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// Enable Multi Sampling Anti Aliasing 4x (if available)
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Raylib.SetConfigFlags(ConfigFlags.Msaa4xHint);
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Raylib.InitWindow(screenWidth, screenHeight, "raylib [shaders] example - custom uniform variable");
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{
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// Define the camera to look into our 3d world
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Camera3D camera = new()
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{
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Position = new Vector3(8.0f, 8.0f, 8.0f),
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Target = new Vector3(0.0f, 1.5f, 0.0f),
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Up = new Vector3(0.0f, 1.0f, 0.0f),
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FovY = 45.0f,
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Projection = CameraProjection.Perspective
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};
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var model = Raylib.LoadModel("resources/models/obj/barracks.obj");
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var texture = Raylib.LoadTexture("resources/models/obj/barracks_diffuse.png");
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// Set model diffuse texture
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Raylib.SetMaterialTexture(ref model, 0, MaterialMapIndex.Albedo, ref texture);
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Vector3 position = new(0.0f, 0.0f, 0.0f);
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// Load postpro shader
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var shader = Raylib.LoadShader(
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"resources/shaders/glsl330/base.vs",
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"resources/shaders/glsl330/swirl.fs"
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);
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// Get variable (uniform) location on the shader to connect with the program
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// NOTE: If uniform variable could not be found in the shader, function returns -1
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var swirlCenterLoc = Raylib.GetShaderLocation(shader, "center");
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var screenSizeLoc = Raylib.GetShaderLocation(shader, "texSize");
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var swirlCenter = new Vector2((float)screenWidth / 2, (float)screenHeight / 2);
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// Create a RenderTexture2D to be used for render to texture
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var target = Raylib.LoadRenderTexture(screenWidth, screenHeight);
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Raylib.SetTargetFPS(60);
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//--------------------------------------------------------------------------------------
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// Main game loop
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while (!Raylib.WindowShouldClose())
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{
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// Update
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//----------------------------------------------------------------------------------
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var mousePosition = Raylib.GetMousePosition();
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swirlCenter.X = mousePosition.X;
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swirlCenter.Y = screenHeight - mousePosition.Y;
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// Send new value to the shader to be used on drawing
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Raylib.SetShaderValue(shader, swirlCenterLoc, swirlCenter, ShaderUniformDataType.Vec2);
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Raylib.SetShaderValue(shader, screenSizeLoc, new Vector2(screenWidth, screenHeight), ShaderUniformDataType.Vec2);
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Raylib.UpdateCamera(ref camera, CameraMode.Orbital);
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//----------------------------------------------------------------------------------
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// Draw
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//----------------------------------------------------------------------------------
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Raylib.BeginDrawing();
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{
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Raylib.ClearBackground(Color.RayWhite);
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// Enable drawing to texture
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Raylib.BeginTextureMode(target);
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{
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Raylib.ClearBackground(Color.RayWhite);
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Raylib.BeginMode3D(camera);
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{
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Raylib.DrawModel(model, position, 0.5f, Color.White);
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Raylib.DrawGrid(10, 1.0f);
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}
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Raylib.EndMode3D();
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Raylib.DrawText("TEXT DRAWN IN RENDER TEXTURE", 200, 10, 30, Color.Red);
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}
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// End drawing to texture (now we have a texture available for next passes)
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Raylib.EndTextureMode();
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Raylib.BeginShaderMode(shader);
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{
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// NOTE: Render texture must be y-flipped due to default OpenGL coordinates (left-bottom)
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Raylib.DrawTextureRec(
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target.Texture,
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new Rectangle(0, 0, target.Texture.Width, -target.Texture.Height),
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new Vector2(0, 0),
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Color.White
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);
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}
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Raylib.EndShaderMode();
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Raylib.DrawText(
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"(c) Barracks 3D model by Alberto Cano",
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screenWidth - 220,
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screenHeight - 20,
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10,
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Color.Gray
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);
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Raylib.DrawFPS(10, 10);
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}
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Raylib.EndDrawing();
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//----------------------------------------------------------------------------------
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}
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// De-Initialization
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//--------------------------------------------------------------------------------------
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Raylib.UnloadShader(shader);
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Raylib.UnloadTexture(texture);
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Raylib.UnloadModel(model);
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Raylib.UnloadRenderTexture(target);
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}
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Raylib.CloseWindow();
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//--------------------------------------------------------------------------------------
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return 0;
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}
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}

‎Community/Shaders/RaylibCsExamples.Community.Shaders.CustomUniform/RaylibCsExamples.Community.Shaders.CustomUniform.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>net9.0</TargetFramework>
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<ImplicitUsings>enable</ImplicitUsings>
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<Nullable>enable</Nullable>
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</PropertyGroup>
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<ItemGroup>
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<Content Include="../../resources/models/obj/barracks.obj" Link="resources/models/obj/barracks.obj">
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<CopyToOutputDirectory>Always</CopyToOutputDirectory>
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</Content>
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<Content Include="../../resources/models/obj/barracks_diffuse.png" Link="resources/models/obj/barracks_diffuse.png">
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<CopyToOutputDirectory>Always</CopyToOutputDirectory>
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</Content>
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<Content Include="../../resources/shaders/glsl330/base.vs" Link="resources/shaders/glsl330/base.vs">
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<CopyToOutputDirectory>Always</CopyToOutputDirectory>
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</Content>
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<Content Include="../../resources/shaders/glsl330/swirl.fs" Link="resources/shaders/glsl330/swirl.fs">
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<CopyToOutputDirectory>Always</CopyToOutputDirectory>
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</Content>
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</ItemGroup>
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</Project>

‎Community/resources/shaders/glsl330/swirl.fs‎

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// NOTE: Add here your custom variables
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// NOTE: Render size values should be passed from code
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const float renderWidth = 800;
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const float renderHeight = 450;
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uniform vec2 texSize = vec2(1600, 900);
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float radius = 250.0;
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float angle = 0.8;
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void main()
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{
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vec2 texSize = vec2(renderWidth, renderHeight);
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vec2 tc = fragTexCoord*texSize;
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tc -= center;
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‎RaylibCsExamples.slnx‎

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<Folder Name="/Community/Shaders/">
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<Project Path="Community/Shaders/RaylibCsExamples.Community.Shaders.BasicLighting/RaylibCsExamples.Community.Shaders.BasicLighting.csproj" />
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<Project Path="Community/Shaders/RaylibCsExamples.Community.Shaders.BasicPbr/RaylibCsExamples.Community.Shaders.BasicPbr.csproj" />
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<Project Path="Community/Shaders/RaylibCsExamples.Community.Shaders.CustomUniform/RaylibCsExamples.Community.Shaders.CustomUniform.csproj" />
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</Folder>
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<Folder Name="/Local/" />
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<Folder Name="/Local/Objects/">

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