public void CreateMaterialRender(GLContext control, GenericPickableMesh mesh,
RenderObject renderObject, EventHandler thumbnailUpdated, int width = 50, int height = 50)
{
ShaderProgram shader = this.GetShader();
if (shader == null)
{
return;
}
Framebuffer frameBuffer = new Framebuffer(FramebufferTarget.Framebuffer, width, height);
frameBuffer.Bind();
//Create a simple mvp matrix to render the material data
Matrix4 modelMatrix = Matrix4.CreateTranslation(0, 0, -12);
Matrix4 viewMatrix = Matrix4.Identity;
Matrix4 mtxProj = Matrix4.CreatePerspectiveFieldOfView(MathHelper.DegreesToRadians(90), 1.0f, 1.0f, 1000f);
Matrix4 viewProj = mtxProj * viewMatrix;
GL.UseProgram(shader.program);
shader.SetMatrix4x4("mtxCam", ref viewProj);
shader.SetMatrix4x4("mtxMdl", ref modelMatrix);
shader.SetVector3("camPosition", control.Camera.TargetPosition);
shader.SetVector2("iResolution", new Vector2(control.Width, control.Height));
shader.SetInt("materialRenderDisplay", 1);
GL.ClearColor(0, 0, 0, 0);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
GL.Viewport(0, 0, width, height);
//Render material data onto a textured sphere
Render(control, shader, mesh);
GL.Enable(EnableCap.Blend);
GL.BlendFuncSeparate(
BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha,
BlendingFactorSrc.One, BlendingFactorDest.OneMinusSrcAlpha);
//Draw the model to render onto
switch (renderObject)
{
case RenderObject.Sphere:
DrawSphere(control);
break;
case RenderObject.Plane:
DrawPlane(control);
break;
}
//Disable the uniform data
shader.SetInt("materialRenderDisplay", 0);
//Disable shader and textures
GL.UseProgram(0);
GL.BindTexture(TextureTarget.Texture2D, 0);
var thumbnail = frameBuffer.ReadImagePixels(true);
//Dispose frame buffer
frameBuffer.Dispoe();
frameBuffer.DisposeRenderBuffer();
this.Thumbnail = thumbnail;
thumbnailUpdated?.Invoke(this, EventArgs.Empty);
}
public static GLTexture2D CreateTextureRender(GLTexture texture, int arrayLevel, int mipLevel, bool force = false)
{
if (!force && cubemapCache.ContainsKey(texture.ID.ToString()))
{
return(cubemapCache[texture.ID.ToString()]);
}
else
{
if (cubemapCache.ContainsKey(texture.ID.ToString()))
{
cubemapCache[texture.ID.ToString()]?.Dispose();
}
}
int width = texture.Width * 4;
int height = texture.Height * 3;
width = 512;
height = 256;
var shader = GlobalShaders.GetShader("EQUIRECTANGULAR");
var textureOutput = GLTexture2D.CreateUncompressedTexture(width, height, PixelInternalFormat.Rgba32f);
textureOutput.MipCount = texture.MipCount;
texture.Bind();
textureOutput.Bind();
textureOutput.GenerateMipmaps();
textureOutput.Unbind();
Framebuffer frameBuffer = new Framebuffer(FramebufferTarget.Framebuffer, width, height);
frameBuffer.Bind();
GL.Disable(EnableCap.Blend);
shader.Enable();
shader.SetBoolToInt("is_array", texture is GLTextureCubeArray);
if (texture is GLTextureCubeArray)
{
GL.ActiveTexture(TextureUnit.Texture1);
texture.Bind();
shader.SetInt("dynamic_texture_array", 1);
}
else
{
GL.ActiveTexture(TextureUnit.Texture1);
texture.Bind();
shader.SetInt("dynamic_texture", 1);
}
for (int i = 0; i < textureOutput.MipCount; i++)
{
int mipWidth = (int)(width * Math.Pow(0.5, i));
int mipHeight = (int)(height * Math.Pow(0.5, i));
frameBuffer.Resize(mipWidth, mipHeight);
GL.FramebufferTexture(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0,
textureOutput.ID, i);
shader.SetInt("arrayLevel", arrayLevel);
shader.SetInt("mipLevel", mipLevel);
GL.ClearColor(0, 0, 0, 0);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
GL.Viewport(0, 0, mipWidth, mipHeight);
//Draw the texture onto the framebuffer
ScreenQuadRender.Draw();
break;
}
//Disable shader and textures
GL.UseProgram(0);
GL.BindTexture(TextureTarget.Texture2D, 0);
if (cubemapCache.ContainsKey(texture.ID.ToString()))
{
cubemapCache[texture.ID.ToString()] = textureOutput;
}
else
{
cubemapCache.Add(texture.ID.ToString(), textureOutput);
}
return(textureOutput);
}
public void Attach(FramebufferAttachment attachment, Framebuffer target)
{
target.Bind();
GL.FramebufferRenderbuffer(target.Target, attachment, RenderbufferTarget.Renderbuffer, ID);
}
public virtual void Attach(FramebufferAttachment attachment, Framebuffer target)
{
target.Bind();
GL.FramebufferTexture(target.Target, attachment, ID, 0);
}