148 lines
4.7 KiB
C#
148 lines
4.7 KiB
C#
/*******************************************************************************************
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*
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* raylib [shaders] example - vertex displacement
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*
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* Example complexity rating: [★★★☆] 3/4
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*
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* Example originally created with raylib 5.0, last time updated with raylib 4.5
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*
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* Example contributed by Alex ZH (@ZzzhHe) and reviewed by Ramon Santamaria (@raysan5)
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*
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* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
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* BSD-like license that allows static linking with closed source software
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*
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* Copyright (c) 2023-2025 Alex ZH (@ZzzhHe)
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*
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********************************************************************************************/
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using System.Numerics;
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using static Raylib_cs.Raylib;
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using static Raylib_cs.Rlgl;
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namespace Examples.Shaders;
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public partial class VertexDisplacement : IExample
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{
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private const int screenWidth = 800;
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private const int screenHeight = 450;
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#if BROWSER
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const int GlslVersion = 100; // WebGL1 needs GLSL ES 100
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#else
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private const int GlslVersion = 330;
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#endif
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public string Name => "Shaders / Vertex Displacement";
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public string Title => "raylib [shaders] example - vertex displacement";
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private Camera3D camera;
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private Shader shader;
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private Texture2D perlinNoiseMap;
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private Model planeModel;
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private float time;
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public unsafe void Init()
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{
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// set up camera
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camera = new();
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camera.Position = new Vector3(20.0f, 5.0f, -20.0f);
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camera.Target = new Vector3(0.0f, 0.0f, 0.0f);
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camera.Up = new Vector3(0.0f, 1.0f, 0.0f);
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camera.FovY = 60.0f;
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camera.Projection = CameraProjection.Perspective;
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// Load vertex and fragment shaders
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shader = LoadShader(
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$"resources/shaders/glsl{GlslVersion}/vertex_displacement.vs",
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$"resources/shaders/glsl{GlslVersion}/vertex_displacement.fs"
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);
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// Load perlin noise texture
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var perlinNoiseImage = GenImagePerlinNoise(512, 512, 0, 0, 1.0f);
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perlinNoiseMap = LoadTextureFromImage(perlinNoiseImage);
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UnloadImage(perlinNoiseImage);
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// Set shader uniform location
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var perlinNoiseMapLoc = GetShaderLocation(shader, "perlinNoiseMap");
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EnableShader(shader.Id);
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ActiveTextureSlot(1);
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EnableTexture(perlinNoiseMap.Id);
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SetUniformSampler(perlinNoiseMapLoc, 1);
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// Create a plane mesh and model
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var planeMesh = GenMeshPlane(50, 50, 50, 50);
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planeModel = LoadModelFromMesh(planeMesh);
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// Set plane model material
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var materials = planeModel.Materials;
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materials[0].Shader = shader;
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time = 0.0f;
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}
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public unsafe void Update()
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{
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// Update
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//----------------------------------------------------------------------------------
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UpdateCamera(ref camera, CameraMode.Free); // Update camera
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time += GetFrameTime(); // Update time variable
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Raylib.SetShaderValue(shader, GetShaderLocation(shader, "time"), time, ShaderUniformDataType.Float); // Send time value to shader
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// Draw
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//----------------------------------------------------------------------------------
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BeginDrawing();
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ClearBackground(Color.RayWhite);
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BeginMode3D(camera);
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BeginShaderMode(shader);
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// Draw plane model
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DrawModel(planeModel, new Vector3(0.0f, 0.0f, 0.0f), 1.0f, new Color(255, 255, 255, 255));
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EndShaderMode();
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EndMode3D();
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DrawText("Vertex displacement", 10, 10, 20, Color.DarkGray);
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DrawFPS(10, 40);
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EndDrawing();
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//----------------------------------------------------------------------------------
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}
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public void Unload()
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{
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UnloadShader(shader);
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UnloadModel(planeModel);
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UnloadTexture(perlinNoiseMap);
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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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InitWindow(screenWidth, screenHeight, "raylib [shaders] example - vertex displacement");
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SetTargetFPS(60);
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//--------------------------------------------------------------------------------------
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var game = new VertexDisplacement();
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game.Init();
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// Main game loop
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while (!WindowShouldClose()) // Detect window close button or ESC key
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{
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game.Update();
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}
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game.Unload();
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// De-Initialization
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//--------------------------------------------------------------------------------------
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CloseWindow(); // Close window and OpenGL context
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//--------------------------------------------------------------------------------------
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return 0;
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}
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}
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