private void RenderVoxels(Vector3 cameraPosition, float[] cam)
{
_voxelShader.Activate();
GL.ActiveTexture(TextureUnit.Texture0);
_materialTextureArray.Activate();
GL.Uniform1(_voxelShader.GetResourceLocation(ShaderResourceType.Uniform, "texArray"), TextureUnit.Texture0 - TextureUnit.Texture0);
GL.UniformMatrix4(_voxelShader.GetResourceLocation(ShaderResourceType.Uniform, "camera"), 1, false, cam);
GL.Uniform3(_voxelShader.GetResourceLocation(ShaderResourceType.Uniform, "cameraPosition"), cameraPosition.ToOpenTK());
GL.Uniform3(_voxelShader.GetResourceLocation(ShaderResourceType.Uniform, "ambientLightColor"), new OpenTK.Vector3(0.1f, 0.1f, 0.1f));
GL.Uniform3(_voxelShader.GetResourceLocation(ShaderResourceType.Uniform, "lightDirection"), new OpenTK.Vector3(1f, 1.5f, -2f).Normalized());
GL.Uniform3(_voxelShader.GetResourceLocation(ShaderResourceType.Uniform, "lightColor"), new OpenTK.Vector3(1f, 1f, 1f));
foreach (var valuePair in _chunkGeometrys)
{
_amountBuffers[valuePair.Key].ActivateBind(3);
_idBuffers[valuePair.Key].ActivateBind(4);
if (valuePair.Value.IDLength > 0)
{
valuePair.Value.Draw();
}
_idBuffers[valuePair.Key].Deactivate();
_amountBuffers[valuePair.Key].Deactivate();
}
_materialTextureArray.Deactivate();
_voxelShader.Deactivate();
}
/// <summary>
/// Initializes a new instance of the <see cref="FBO"/> class.
/// </summary>
/// <param name="size"></param>
/// <exception cref="FBOException">
/// Given texture is null or texture dimensions do not match primary texture
/// </exception>
public CubeMapFBO(int size)
{
_size = size;
// Create an FBO object
GL.GenFramebuffers(1, out _fboHandle);
Texture = new Texture(TextureTarget.TextureCubeMap);
//Initialize empty textures in texture
Texture.Activate();
for (int i = 0; i < 6; i++)
{
GL.TexImage2D(TextureTarget.TextureCubeMapPositiveX + i, 0, PixelInternalFormat.Rgba32f, size, size, 0, PixelFormat.Rgba, PixelType.Float, IntPtr.Zero);
}
Texture.Deactivate();
//Bind texture to framebuffer
Activate();
for (int i = 0; i < 6; i++)
{
GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0 + i, TextureTarget.TextureCubeMapPositiveX + i, Texture.ID, 0);
}
string status = GetStatusMessage();
Deactivate();
if (!string.IsNullOrEmpty(status))
{
throw new FBOException(status);
}
//Attach depth
Activate();
_depth = new RenderBuffer(RenderbufferStorage.DepthComponent32, _size, _size);
_depth.Attach(FramebufferAttachment.DepthAttachment);
status = GetStatusMessage();
Deactivate();
if (!string.IsNullOrEmpty(status))
{
throw new FBOException(status);
}
int linMin = (int)TextureMinFilter.LinearMipmapLinear;
int linMag = (int)TextureMagFilter.Linear;
int clampToEdge = (int)TextureWrapMode.ClampToEdge;
Texture.Activate();
GL.TexParameterI(TextureTarget.TextureCubeMap, TextureParameterName.TextureMinFilter, ref linMin);
GL.TexParameterI(TextureTarget.TextureCubeMap, TextureParameterName.TextureMagFilter, ref linMag);
GL.TexParameterI(TextureTarget.TextureCubeMap, TextureParameterName.TextureWrapS, ref clampToEdge);
GL.TexParameterI(TextureTarget.TextureCubeMap, TextureParameterName.TextureWrapT, ref clampToEdge);
GL.TexParameterI(TextureTarget.TextureCubeMap, TextureParameterName.TextureWrapR, ref clampToEdge);
Texture.Deactivate();
}
private void Render()
{
bool doPostProcessing = !Keyboard.GetState()[Key.Space];
if (doPostProcessing)
{
postProcessing.Start();
}
GL.Color3(Color.White);
//draw background
texBackground.Activate();
background.DrawTexturedRect(Box2D.BOX01);
texBackground.Deactivate();
//draw player
texBird.Activate();
bird.DrawTexturedRect(Box2D.BOX01);
texBird.Deactivate();
if (doPostProcessing)
{
postProcessing.EndAndApply((float)globalTime.Elapsed.TotalSeconds);
}
}
public void Render()
{
GL.Disable(EnableCap.CullFace);
_shader.Activate();
_texture.Activate();
_geometry.Draw();
_texture.Deactivate();
_shader.Deactivate();
GL.Enable(EnableCap.CullFace);
}
private static void DrawTexturedRect(Box2D rect, Texture tex, Box2D texCoords)
{
tex.Activate();
GL.Begin(PrimitiveType.Quads);
GL.TexCoord2(texCoords.X, texCoords.Y); GL.Vertex2(rect.X, rect.Y);
GL.TexCoord2(texCoords.MaxX, texCoords.Y); GL.Vertex2(rect.MaxX, rect.Y);
GL.TexCoord2(texCoords.MaxX, texCoords.MaxY); GL.Vertex2(rect.MaxX, rect.MaxY);
GL.TexCoord2(texCoords.X, texCoords.MaxY); GL.Vertex2(rect.X, rect.MaxY);
GL.End();
tex.Deactivate();
}
private static void DrawTexturedRect(Box2D Rectangle, Texture tex)
{
GL.Color3(Color.White);
tex.Activate();
GL.Begin(PrimitiveType.Quads);
GL.TexCoord2(0.0f, 0.0f); GL.Vertex2(Rectangle.X, Rectangle.Y);
GL.TexCoord2(1.0f, 0.0f); GL.Vertex2(Rectangle.MaxX, Rectangle.Y);
GL.TexCoord2(1.0f, 1.0f); GL.Vertex2(Rectangle.MaxX, Rectangle.MaxY);
GL.TexCoord2(0.0f, 1.0f); GL.Vertex2(Rectangle.X, Rectangle.MaxY);
GL.End();
tex.Deactivate();
}
static void DrawSprite(float x, float y, Texture tex, float radius = 0.5f, float repeat = 1.0f)
{
tex.Activate();
GL.Color3(Color.White);
GL.Begin(PrimitiveType.Quads);
GL.TexCoord2(0.0f, 0.0f); GL.Vertex2(x - radius, y - radius);
GL.TexCoord2(repeat, 0.0f); GL.Vertex2(x + radius, y - radius);
GL.TexCoord2(repeat, repeat); GL.Vertex2(x + radius, y + radius);
GL.TexCoord2(0.0f, repeat); GL.Vertex2(x - radius, y + radius);
GL.End();
tex.Deactivate();
}
private static void DrawTexturedRect(Box2D Rect, Texture tex)
{
//the texture has to be enabled before use
tex.Activate();
GL.Begin(PrimitiveType.Quads);
//when using textures we have to set a texture coordinate for each vertex
//by using the TexCoord command BEFORE the Vertex command
GL.TexCoord2(0.0f, 0.0f); GL.Vertex2(Rect.X, Rect.Y);
GL.TexCoord2(1.0f, 0.0f); GL.Vertex2(Rect.MaxX, Rect.Y);
GL.TexCoord2(1.0f, 1.0f); GL.Vertex2(Rect.MaxX, Rect.MaxY);
GL.TexCoord2(0.0f, 1.0f); GL.Vertex2(Rect.X, Rect.MaxY);
GL.End();
//the texture is disabled, so no other draw calls use this texture
tex.Deactivate();
}
private void DrawEnvironment(Shader shader, CameraOrbit camera)
{
// camera
var cam = camera.CalcMatrix().ToOpenTK();
GL.Uniform3(shader.GetUniformLocation("cameraPosition"), camera.CalcPosition().ToOpenTK());
GL.UniformMatrix4(shader.GetUniformLocation("camera"), true, ref cam);
// environment
// different ids to differentiate spheres in fragment shader
var id = 1;
// variable that excludes object from shadow throwing
envMap_tex.Activate();
GL.Uniform1(shader.GetUniformLocation("id"), id);
this.environment.SetAttribute(shader.GetAttributeLocation("instancePosition"), new Vector3[] { new Vector3(0, 0, 0) }, VertexAttribPointerType.Float, 3, true);
this.environment.Draw();
envMap_tex.Deactivate();
}
private void DrawField(IGameState gameState)
{
//background
var field = new Box2D(0, 0, gameState.GridWidth, gameState.GridHeight);
texTable.Activate();
field.DrawTexturedRect(new Box2D(0, 0, 8, 8));
texTable.Deactivate();
//grid
GL.Color3(Color.Black);
GL.LineWidth(3.0f);
GL.Begin(PrimitiveType.Lines);
for (int i = 0; i <= gameState.GridWidth; ++i)
{
GL.Vertex2(i, 0.0);
GL.Vertex2(i, gameState.GridHeight);
}
for (int i = 0; i <= gameState.GridHeight; ++i)
{
GL.Vertex2(0.0, i);
GL.Vertex2(gameState.GridWidth, i);
}
GL.End();
//chips
GL.Enable(EnableCap.Blend);
GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
for (int x = 0; x < gameState.GridWidth; ++x)
{
for (int y = 0; y < gameState.GridHeight; ++y)
{
var type = gameState[x, y];
if (FieldType.EMPTY == type)
{
continue;
}
DrawSprite(x + 0.5f, y + 0.5f, FieldType.BLACK == type ? texBlack : texWhite, 0.45f);
}
}
GL.Disable(EnableCap.Blend);
DrawSelection(gameState.LastMoveX, gameState.LastMoveY);
}
private static void DrawTexturedRect(Box2D rect, Texture tex, Box2D texCoords)
{
tex.Activate();
rect.DrawTexturedRect(texCoords);
tex.Deactivate();
}