public void SetSpecificUniforms(IPipelineData pipelineData)
{
int texId = -1;
int normId = -1;
int metRoughId = -1;
int metallicId = -1;
int roughnessId = -1;
int ambientId = -1;
Textures.TryGetValue(Materials.FirstOrDefault().Value.DiffuseMap, out texId);
Textures.TryGetValue(Materials.FirstOrDefault().Value.NormalMap, out normId);
Textures.TryGetValue(Materials.FirstOrDefault().Value.MetallicRoughness, out metRoughId);
Textures.TryGetValue(Materials.FirstOrDefault().Value.Metallic, out metallicId);
Textures.TryGetValue(Materials.FirstOrDefault().Value.Roughness, out roughnessId);
Textures.TryGetValue(Materials.FirstOrDefault().Value.AmbientMap, out ambientId);
_uniformHelper.TryAddUniformTexture2D(texId, maintexture, shaderProg, TextureUnit.Texture0);
_uniformHelper.TryAddUniformTexture2D(normId, normaltexture, shaderProg, TextureUnit.Texture1);
_uniformHelper.TryAddUniformTexture2D(metRoughId, metallicRoughness, shaderProg, TextureUnit.Texture2);
_uniformHelper.TryAddUniformTexture2D(metallicId, metallic, shaderProg, TextureUnit.Texture2);
_uniformHelper.TryAddUniformTexture2D(roughnessId, roughness, shaderProg, TextureUnit.Texture2);
_uniformHelper.TryAddUniformTexture2D(ambientId, amibenOclussionMap, shaderProg, TextureUnit.Texture3);
_uniformHelper.TryAddUniformTextureCubemap(pipelineData.SkyboxComponent.IrradianceMap, irradianceMap, shaderProg, TextureUnit.Texture4);
_uniformHelper.TryAddUniformTextureCubemap(pipelineData.SkyboxComponent.PrefilteredMap, prefilterMap, shaderProg, TextureUnit.Texture5);
_uniformHelper.TryAddUniformTexture2D(pipelineData.SkyboxComponent.BrdfMap, brdf, shaderProg, TextureUnit.Texture6);
_uniformHelper.TryAddUniform1(randomCoeff, "randomCoeff", shaderProg);
_uniformHelper.TryAddUniform1(pipelineData.Lights.Count(), numberOfLights, shaderProg);
Vector3[] lightpositions = new Vector3[pipelineData.Lights.Count()];
Vector3[] lightcolors = new Vector3[pipelineData.Lights.Count()];
for (int j = 0; j < pipelineData.Lights.Count; ++j) {
var lightComponent = (PointLightSceneObjectComponent)pipelineData.Lights[j].components["PointLightSceneObjectComponent"];
lightcolors[j] = lightComponent.Color * lightComponent.LightStrenght;
lightpositions[j] = pipelineData.Lights[j].Position;
}
bool suc = _uniformHelper.TryAddUniform1(lightcolors, lightColor, shaderProg);
bool suc2 = _uniformHelper.TryAddUniform1(lightpositions, lightPosition, shaderProg);
_uniformHelper.TryAddUniform1(pipelineData.Cam.Position, cameraPosition, shaderProg);
_uniformHelper.TryAddUniform1(Materials.FirstOrDefault().Value.NormalScale, "normalScale", shaderProg);
}
private int TransformHdrToPrefilteredCubemap(int textureId, ShaderProg shader, int framebuffer, int renderbuffer, int size = 128, uint mipnapLevels = 5)
{
Cube cube = new Cube();
GL.BindFramebuffer(FramebufferTarget.Framebuffer, framebuffer);
GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0, RenderbufferTarget.Renderbuffer, renderbuffer);
int cubemap = AllocatePrefilterCubemap(size);
Matrix4 projection = Matrix4.Identity;
Matrix4[] views = new Matrix4[6];
GenerateMatricesForMapHdrToCubemap(ref projection, ref views);
ShaderProg prefilteredShader = shader;
GL.UseProgram(prefilteredShader.ProgramID);
prefilteredShader.EnableVertexAttribArrays();
GL.UniformMatrix4(prefilteredShader.GetUniform("projection"), false, ref projection);
UniformHelper helper = new UniformHelper();
bool suc;
suc = helper.TryAddUniformTextureCubemap(textureId, "environmentMap", prefilteredShader, TextureUnit.Texture0);
for (uint i = 0; i < mipnapLevels; ++i)
{
uint mipWidth = (uint)(size * Math.Pow(0.5f, i));
uint mipHeight = (uint)(size * Math.Pow(0.5f, i));
GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, renderbuffer);
GL.RenderbufferStorage(RenderbufferTarget.Renderbuffer, RenderbufferStorage.DepthComponent24, (int)mipWidth, (int)mipHeight);
GL.Viewport(0, 0, (int)mipWidth, (int)mipHeight);
float roughness = (float)i / (float)(mipnapLevels - 1);
helper.TryAddUniform1(roughness, "roughness", prefilteredShader);
GL.BindFramebuffer(FramebufferTarget.Framebuffer, framebuffer);
// GL.Disable(EnableCap.FramebufferSrgb);
//GL.ActiveTexture(TextureUnit.Texture0);
for (uint j = 0; j < 6; ++j)
{
GL.UniformMatrix4(prefilteredShader.GetUniform("view"), false, ref views[j]);
GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0,
TextureTarget.TextureCubeMapPositiveX + (int)j, cubemap, (int)i);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
// GL.Enable(EnableCap.FramebufferSrgb);
cube.RenderCube(); // renders a 1x1 cube
// Console.WriteLine(GL.CheckNamedFramebufferStatus(framebuffer, FramebufferTarget.Framebuffer));
}
prefilteredShader.DisableVertexAttribArrays();
}
GL.BindFramebuffer(FramebufferTarget.Framebuffer, 0);
return(cubemap);
}
private int TransformHdrToCubemap(int textureId, string textureName, ShaderProg shader, int framebuffer, int renderbuffer, int size = 2048)
{
Cube cube = new Cube();
GL.BindFramebuffer(FramebufferTarget.Framebuffer, framebuffer);
GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, renderbuffer);
GL.RenderbufferStorage(RenderbufferTarget.Renderbuffer, RenderbufferStorage.DepthComponent24, size, size);
GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0, RenderbufferTarget.Renderbuffer, renderbuffer);
int cubemap = AllocateCubemap(size);
Matrix4 projection = Matrix4.Identity;
Matrix4[] views = new Matrix4[6];
GenerateMatricesForMapHdrToCubemap(ref projection, ref views);
ShaderProg equirectangularToCubemapShader = shader;
GL.UseProgram(equirectangularToCubemapShader.ProgramID);
equirectangularToCubemapShader.EnableVertexAttribArrays();
GL.UniformMatrix4(equirectangularToCubemapShader.GetUniform("projection"), false, ref projection);
UniformHelper helper = new UniformHelper();
bool suc;
if (textureName == "equirectangularMap")
{
suc = helper.TryAddUniformTexture2D(textureId, textureName, equirectangularToCubemapShader, TextureUnit.Texture0);
}
else
{
suc = helper.TryAddUniformTextureCubemap(textureId, textureName, equirectangularToCubemapShader, TextureUnit.Texture0);
}
GL.Viewport(0, 0, size, size);
GL.BindFramebuffer(FramebufferTarget.Framebuffer, framebuffer);
GL.ActiveTexture(TextureUnit.Texture0);
for (int i = 0; i < 6; ++i)
{
GL.UniformMatrix4(equirectangularToCubemapShader.GetUniform("view"), false, ref views[i]);
GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0,
TextureTarget.TextureCubeMapPositiveX + i, cubemap, 0);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
cube.RenderCube(); // renders a 1x1 cube
}
equirectangularToCubemapShader.DisableVertexAttribArrays();
GL.BindFramebuffer(FramebufferTarget.Framebuffer, 0);
return(cubemap);
}