mirror of
https://github.com/raylib-cs/raylib-cs
synced 2025-04-05 11:19:39 -04:00
268 lines
13 KiB
C#
268 lines
13 KiB
C#
using Raylib;
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using static Raylib.Raylib;
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using static Raylib.Model;
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using static Raylib.CameraMode;
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using System;
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public enum LightType
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{
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LIGHT_DIRECTIONAL,
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LIGHT_POINT
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};
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//TODO: move the light system out into it's own class file, rlights.h original
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//also make it work properly
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public struct Light
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{
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public bool enabled;
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public LightType type;
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public Vector3 position;
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public Vector3 target;
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public Color color;
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public int enabledLoc;
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public int typeLoc;
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public int posLoc;
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public int targetLoc;
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public int colorLoc;
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}
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public partial class models_material_pbr
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{
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/*******************************************************************************************
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*
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* raylib [models] example - PBR material
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*
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* This example has been created using raylib 1.8 (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) 2017 Ramon Santamaria (@raysan5)
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*
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********************************************************************************************/
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public const int CUBEMAP_SIZE = 512;
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public const int IRRADIANCE_SIZE = 32;
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public const int PREFILTERED_SIZE = 256;
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public const int BRDF_SIZE = 512;
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public const int MAX_LIGHTS = 4;
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public static int lightsCount = 0;
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public const float LIGHT_DISTANCE = 3.5f;
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public const float LIGHT_HEIGHT = 1.0f;
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// PBR material loading
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//private static Material LoadMaterialPBR(Color albedo, float metalness, float roughness);
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public unsafe static int Main()
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{
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// Initialization
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//--------------------------------------------------------------------------------------
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int screenWidth = 800;
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int screenHeight = 450;
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SetConfigFlags(FLAG_MSAA_4X_HINT); // Enable Multi Sampling Anti Aliasing 4x (if available)
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InitWindow(screenWidth, screenHeight, "raylib [models] example - pbr material");
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// Define the camera to look into our 3d world
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Camera3D camera = new Camera3D(new Vector3(4.0f, 4.0f, 4.0f), new Vector3(0.0f, 0.5f, 0.0f), new Vector3(0.0f, 1.0f, 0.0f), 45.0f, 0);
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// Load model and PBR material
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Model model = LoadModel("resources/pbr/trooper.obj");
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MeshTangents(ref model.mesh);
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model.material = LoadMaterialPBR(new Color(255, 255, 255, 255), 1.0f, 1.0f);
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// Define lights attributes
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// NOTE: Shader is passed to every light on creation to define shader bindings internally
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Light[] lights = new Light[]
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{
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CreateLight(LightType.LIGHT_POINT, new Vector3( LIGHT_DISTANCE, LIGHT_HEIGHT, 0.0f ), new Vector3( 0.0f, 0.0f, 0.0f ), new Color( 255, 0, 0, 255 ), model.material.shader),
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CreateLight(LightType.LIGHT_POINT, new Vector3( 0.0f, LIGHT_HEIGHT, LIGHT_DISTANCE ), new Vector3( 0.0f, 0.0f, 0.0f ), new Color( 0, 255, 0, 255 ), model.material.shader),
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CreateLight(LightType.LIGHT_POINT, new Vector3( -LIGHT_DISTANCE, LIGHT_HEIGHT, 0.0f ), new Vector3( 0.0f, 0.0f, 0.0f ),new Color( 0, 0, 255, 255 ), model.material.shader),
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CreateLight(LightType.LIGHT_DIRECTIONAL, new Vector3(0.0f, LIGHT_HEIGHT * 2.0f, -LIGHT_DISTANCE ), new Vector3( 0.0f, 0.0f, 0.0f ), new Color(255, 0, 255, 255 ), model.material.shader)
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};
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SetCameraMode(camera, (int)CameraMode.CAMERA_ORBITAL); // Set an orbital camera mode
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SetTargetFPS(60); // Set our game to run at 60 frames-per-second
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//--------------------------------------------------------------------------------------
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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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// Update
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//----------------------------------------------------------------------------------
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UpdateCamera(ref camera); // Update camera
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// Send to material PBR shader camera view position
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float[] cameraPos = { camera.position.x, camera.position.y, camera.position.z };
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SetShaderValue(model.material.shader, model.material.shader.locs[(int)ShaderLocationIndex.LOC_VECTOR_VIEW], cameraPos, 3);
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//----------------------------------------------------------------------------------
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// Draw
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//----------------------------------------------------------------------------------
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BeginDrawing();
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ClearBackground(RAYWHITE);
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BeginMode3D(camera);
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DrawModel(model, Vector3Zero(), 1.0f, WHITE);
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DrawGrid(10, 1.0f);
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EndMode3D();
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DrawFPS(10, 10);
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EndDrawing();
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//----------------------------------------------------------------------------------
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}
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// De-Initialization
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//--------------------------------------------------------------------------------------
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UnloadModel(model); // Unload skybox model
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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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// Load PBR material (Supports: ALBEDO, NORMAL, METALNESS, ROUGHNESS, AO, EMMISIVE, HEIGHT maps)
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// NOTE: PBR shader is loaded inside this function
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unsafe public static Material LoadMaterialPBR(Color albedo, float metalness, float roughness)
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{
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Material mat = new Material(); // NOTE: All maps textures are set to { 0 )
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string PATH_PBR_VS = "resources/shaders/pbr.vs";
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string PATH_PBR_FS = "resources/shaders/pbr.fs";
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mat.shader = LoadShader(PATH_PBR_VS, PATH_PBR_FS);
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// Get required locations points for PBR material
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// NOTE: Those location names must be available and used in the shader code
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mat.shader.locs[(int)ShaderLocationIndex.LOC_MAP_ALBEDO] = GetShaderLocation(mat.shader, "albedo.sampler");
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mat.shader.locs[(int)ShaderLocationIndex.LOC_MAP_METALNESS] = GetShaderLocation(mat.shader, "metalness.sampler");
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mat.shader.locs[(int)ShaderLocationIndex.LOC_MAP_NORMAL] = GetShaderLocation(mat.shader, "normals.sampler");
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mat.shader.locs[(int)ShaderLocationIndex.LOC_MAP_ROUGHNESS] = GetShaderLocation(mat.shader, "roughness.sampler");
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mat.shader.locs[(int)ShaderLocationIndex.LOC_MAP_OCCLUSION] = GetShaderLocation(mat.shader, "occlusion.sampler");
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//mat.shader.locs[LOC_MAP_EMISSION] = GetShaderLocation(mat.shader, "emission.sampler");
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//mat.shader.locs[LOC_MAP_HEIGHT] = GetShaderLocation(mat.shader, "height.sampler");
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mat.shader.locs[(int)ShaderLocationIndex.LOC_MAP_IRRADIANCE] = GetShaderLocation(mat.shader, "irradianceMap");
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mat.shader.locs[(int)ShaderLocationIndex.LOC_MAP_PREFILTER] = GetShaderLocation(mat.shader, "prefilterMap");
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mat.shader.locs[(int)ShaderLocationIndex.LOC_MAP_BRDF] = GetShaderLocation(mat.shader, "brdfLUT");
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// Set view matrix location
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mat.shader.locs[(int)ShaderLocationIndex.LOC_MATRIX_MODEL] = GetShaderLocation(mat.shader, "matModel");
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mat.shader.locs[(int)ShaderLocationIndex.LOC_MATRIX_VIEW] = GetShaderLocation(mat.shader, "view");
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mat.shader.locs[(int)ShaderLocationIndex.LOC_VECTOR_VIEW] = GetShaderLocation(mat.shader, "viewPos");
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// Set PBR standard maps
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mat.maps[(int)TexmapIndex.MAP_ALBEDO].texture = LoadTexture("resources/pbr/trooper_albedo.png");
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mat.maps[(int)TexmapIndex.MAP_NORMAL].texture = LoadTexture("resources/pbr/trooper_normals.png");
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mat.maps[(int)TexmapIndex.MAP_METALNESS].texture = LoadTexture("resources/pbr/trooper_metalness.png");
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mat.maps[(int)TexmapIndex.MAP_ROUGHNESS].texture = LoadTexture("resources/pbr/trooper_roughness.png");
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mat.maps[(int)TexmapIndex.MAP_OCCLUSION].texture = LoadTexture("resources/pbr/trooper_ao.png");
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// Set environment maps
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const string PATH_CUBEMAP_VS = "resources/shaders/cubemap.vs"; // Path to equirectangular to cubemap vertex shader
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const string PATH_CUBEMAP_FS = "resources/shaders/cubemap.fs"; // Path to equirectangular to cubemap fragment shader
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const string PATH_SKYBOX_VS = "resources/shaders/skybox.vs"; // Path to skybox vertex shader
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const string PATH_IRRADIANCE_FS = "resources/shaders/irradiance.fs"; // Path to irradiance (GI) calculation fragment shader
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const string PATH_PREFILTER_FS = "resources/shaders/prefilter.fs"; // Path to reflection prefilter calculation fragment shader
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const string PATH_BRDF_VS = "resources/shaders/brdf.vs"; // Path to bidirectional reflectance distribution function vertex shader
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const string PATH_BRDF_FS = "resources/shaders/brdf.fs"; // Path to bidirectional reflectance distribution function fragment shader
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Shader shdrCubemap = LoadShader(PATH_CUBEMAP_VS, PATH_CUBEMAP_FS);
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Shader shdrIrradiance = LoadShader(PATH_SKYBOX_VS, PATH_IRRADIANCE_FS);
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Shader shdrPrefilter = LoadShader(PATH_SKYBOX_VS, PATH_PREFILTER_FS);
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Shader shdrBRDF = LoadShader(PATH_BRDF_VS, PATH_BRDF_FS);
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// Setup required shader locations
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SetShaderValuei(shdrCubemap, GetShaderLocation(shdrCubemap, "equirectangularMap"), new int[] { 0 }, 1);
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SetShaderValuei(shdrIrradiance, GetShaderLocation(shdrIrradiance, "environmentMap"), new int[] { 0 }, 1);
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SetShaderValuei(shdrPrefilter, GetShaderLocation(shdrPrefilter, "environmentMap"), new int[] { 0 }, 1);
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Texture2D texHDR = LoadTexture("resources/dresden_square.hdr");
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Texture2D cubemap = GenTextureCubemap(shdrCubemap, texHDR, CUBEMAP_SIZE);
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mat.maps[(int)TexmapIndex.MAP_IRRADIANCE].texture = GenTextureIrradiance(shdrIrradiance, cubemap, IRRADIANCE_SIZE);
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mat.maps[(int)TexmapIndex.MAP_PREFILTER].texture = GenTexturePrefilter(shdrPrefilter, cubemap, PREFILTERED_SIZE);
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mat.maps[(int)TexmapIndex.MAP_BRDF].texture = GenTextureBRDF(shdrBRDF, cubemap, BRDF_SIZE);
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UnloadTexture(cubemap);
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UnloadTexture(texHDR);
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// Unload already used shaders (to create specific textures)
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UnloadShader(shdrCubemap);
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UnloadShader(shdrIrradiance);
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UnloadShader(shdrPrefilter);
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UnloadShader(shdrBRDF);
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// Set textures filtering for better quality
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SetTextureFilter(mat.maps[(int)TexmapIndex.MAP_ALBEDO].texture, (int)TextureFilterMode.FILTER_BILINEAR);
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SetTextureFilter(mat.maps[(int)TexmapIndex.MAP_NORMAL].texture, (int)TextureFilterMode.FILTER_BILINEAR);
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SetTextureFilter(mat.maps[(int)TexmapIndex.MAP_METALNESS].texture, (int)TextureFilterMode.FILTER_BILINEAR);
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SetTextureFilter(mat.maps[(int)TexmapIndex.MAP_ROUGHNESS].texture, (int)TextureFilterMode.FILTER_BILINEAR);
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SetTextureFilter(mat.maps[(int)TexmapIndex.MAP_OCCLUSION].texture, (int)TextureFilterMode.FILTER_BILINEAR);
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// Enable sample usage in shader for assigned textures
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SetShaderValuei(mat.shader, GetShaderLocation(mat.shader, "albedo.useSampler"), new int[] { 1 }, 1);
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SetShaderValuei(mat.shader, GetShaderLocation(mat.shader, "normals.useSampler"), new int[] { 1 }, 1);
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SetShaderValuei(mat.shader, GetShaderLocation(mat.shader, "metalness.useSampler"), new int[] { 1 }, 1);
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SetShaderValuei(mat.shader, GetShaderLocation(mat.shader, "roughness.useSampler"), new int[] { 1 }, 1);
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SetShaderValuei(mat.shader, GetShaderLocation(mat.shader, "occlusion.useSampler"), new int[] { 1 }, 1);
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int renderModeLoc = GetShaderLocation(mat.shader, "renderMode");
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SetShaderValuei(mat.shader, renderModeLoc, new int[] { 0 }, 1);
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// Set up material properties color
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mat.maps[(int)TexmapIndex.MAP_ALBEDO].color = albedo;
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mat.maps[(int)TexmapIndex.MAP_NORMAL].color = new Color(128, 128, 255, 255);
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mat.maps[(int)TexmapIndex.MAP_METALNESS].value = metalness;
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mat.maps[(int)TexmapIndex.MAP_ROUGHNESS].value = roughness;
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mat.maps[(int)TexmapIndex.MAP_OCCLUSION].value = 1.0f;
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mat.maps[(int)TexmapIndex.MAP_EMISSION].value = 0.5f;
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mat.maps[(int)TexmapIndex.MAP_HEIGHT].value = 0.5f;
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return mat;
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}
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public static Light CreateLight(LightType type, Vector3 pos, Vector3 targ, Color color, Shader shader)
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{
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Light light = new Light();
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if (lightsCount < MAX_LIGHTS)
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{
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light.enabled = true;
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light.type = type;
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light.position = pos;
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light.target = targ;
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light.color = color;
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string enabledName = $"lights[{lightsCount}].enabled\0";
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string typeName = $"lights[{lightsCount}].type\0";
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string posName = $"lights[{lightsCount}].position\0";
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string targetName = $"lights[{lightsCount}].target\0";
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string colorName = $"lights[{lightsCount}].color\0";
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light.enabledLoc = GetShaderLocation(shader, enabledName);
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light.typeLoc = GetShaderLocation(shader, typeName);
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light.posLoc = GetShaderLocation(shader, posName);
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light.targetLoc = GetShaderLocation(shader, targetName);
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light.colorLoc = GetShaderLocation(shader, colorName);
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UpdateLightValues(shader, light);
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lightsCount++;
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}
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return light;
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}
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public static void UpdateLightValues(Shader shader, Light light)
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{
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// Send to shader light enabled state and type
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SetShaderValuei(shader, light.enabledLoc, new int[] { light.enabled ? 1 : 0 }, 1);
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SetShaderValuei(shader, light.typeLoc, new int[] { (int)light.type }, 1);
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// Send to shader light position values
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float[] position = { light.position.x, light.position.y, light.position.z };
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SetShaderValue(shader, light.posLoc, position, 3);
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// Send to shader light target position values
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float[] target = { light.target.x, light.target.y, light.target.z };
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SetShaderValue(shader, light.targetLoc, target, 3);
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// Send to shader light color values
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float[] diff = { light.color.r / 255, light.color.g / 255, light.color.b / 255, light.color.a / 255 };
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SetShaderValue(shader, light.colorLoc, diff, 4);
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}
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}
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