/// <summary>
/// Draws a given quad with the current view-projection-matrix
/// </summary>
/// <param name="quad">The quad to be rendered</param>
/// <param name="mvp">the bloom model-view-projection matrix</param>
/// <param name="bloomDirectionHorizontal">true if bloom is applied horizontally</param>
/// <param name="merge">true if bloom will be merged with original scene</param>
internal void DrawBloom(GeoQuad quad, ref Matrix4 mvp, bool bloomDirectionHorizontal, bool merge, int width, int height, int sceneTexture, int bloomTexture)
{
GL.UniformMatrix4(mUniform_MVP, false, ref mvp);
GL.ActiveTexture(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.Texture2D, bloomTexture);
GL.Uniform1(mUniform_TextureBloom, 0);
if (merge)
{
GL.ActiveTexture(TextureUnit.Texture1);
GL.BindTexture(TextureTarget.Texture2D, sceneTexture);
GL.Uniform1(mUniform_TextureScene, 1);
GL.Uniform1(mUniform_Merge, 1);
}
else
{
GL.Uniform1(mUniform_Merge, 0);
}
GL.Uniform1(mUniform_Horizontal, bloomDirectionHorizontal ? 1 : 0);
GL.Uniform2(mUniform_Resolution, (float)width, (float)height);
GL.BindVertexArray(GeoQuad.VAO);
GL.DrawArrays(PrimitiveType.Triangles, 0, 6);
GL.BindVertexArray(0);
GL.BindTexture(TextureTarget.Texture2D, 0);
}
/// <summary>
/// Loading of basic assets and setup
/// </summary>
/// <param name="e">Event arguments</param>
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
_renderProgram = new Renderer();
_renderProgramBloom = new RendererBloom();
GeoQuad.InitialiseStatic();
_quadBloom = new GeoQuad();
_viewMatrix = Matrix4.LookAt(0, 0, 1, 0, 0, 0, 0, 1, 0);
GL.Enable(EnableCap.Blend);
GL.BlendFunc(BlendingFactor.SrcAlpha, BlendingFactor.OneMinusSrcAlpha);
GL.Disable(EnableCap.DepthTest);
GL.UseProgram(_renderProgram.GetProgramId());
_defaultTextureId = HelperTexture.LoadTextureFromAssembly("default.png");
Color4 backColor = new Color4();
backColor.A = 1.0f;
backColor.R = (0f / 255.0f);
backColor.G = (0f / 255.0f);
backColor.B = (0f / 255.0f);
GL.ClearColor(backColor);
LoadDefaultWorld();
}
/// <summary>
/// Draws a given quad with the current view-projection-matrix
/// </summary>
/// <param name="quad">quad instance</param>
/// <param name="vp">view-projection-matrix</param>
/// <param name="normalMatrix">the quad's normal matrix</param>
/// <param name="modelMatrix">the quad's model matrix</param>
internal void Draw(GeoQuad quad, ref Matrix4 vp, ref Matrix4 normalMatrix, ref Matrix4 modelMatrix, ref Vector4 bloom)
{
Matrix4 mvp = modelMatrix * vp;
GL.UniformMatrix4(mUniform_MVP, false, ref mvp);
GL.UniformMatrix4(mUniform_NormalMatrix, false, ref normalMatrix);
GL.UniformMatrix4(mUniform_ModelMatrix, false, ref modelMatrix);
GL.ActiveTexture(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.Texture2D, quad.mTextureHandle);
GL.Uniform1(mUniform_Texture, 0);
GL.Uniform4(mUniform_Bloom, ref bloom);
GL.BindVertexArray(GeoQuad.VAO);
GL.DrawArrays(PrimitiveType.Triangles, 0, 6);
GL.BindVertexArray(0);
GL.BindTexture(TextureTarget.Texture2D, 0);
}
