void Update()
{
System.Diagnostics.Debug.WriteLine("Draw..");
renderer.Begin();
renderer.Clear();
// render normal triangle
renderer.UseShader(shaderProgram);
renderer.UseVertexBuffer(vb1);
renderer.DrawVertexBuffer(PrimitiveType.Triangles, 0, 3);
// render textured triangle
renderer.UseShader(shaderProgramTextured);
renderer.UseVertexBuffer(vb2.VertexBuffer);
//renderer.UseTexture(brickTexture); // Either use only one texture
renderer.UseTextures(new ITexture2D[] { brickTexture, mossTexture }); // or multiple textures
shaderProgramTextured.SetUniform(sampler1, 0); // the order of the textures is determined by setting the uniform to the right index of the texture
shaderProgramTextured.SetUniform(sampler2, 1);
renderer.DrawVertexBufferIndexed(PrimitiveType.Triangles, 6);
// animate color
uniformValue = uniformValue + 0.01f;
uniformValue = uniformValue > 1.0f ? 1.0f : uniformValue;
shaderProgramColored.SetUniform(multiplicator, uniformValue);
// render colored triangle
renderer.UseShader(shaderProgramColored);
renderer.UseVertexBuffer(vb3.VertexBuffer);
renderer.DrawVertexBufferIndexed(PrimitiveType.Triangles, 3);
renderer.SwapBuffers();
// end probably useless.. don't know if possible failures are due to wpf
//renderer.End();
}
/// <summary>
/// Initializes the graphics engine, the renderer, a plain shader program, vertex buffer and the viewport for a given handle.
/// </summary>
void InitializeSurface(IntPtr handle)
{
System.Diagnostics.Debug.WriteLine("Initialize Engine..");
// initialize graphics and a renderer using a window handle
graphics = Engine.initializeGraphics(RenderingAPI.OpenGL);
renderer = graphics.CreateRenderer(handle);
renderer.UseSRGBFramebuffer();
// Create shader program by using shader sources
ShaderSource[] sources =
{
new ShaderSource(ShaderType.VertexShader, Properties.Resources.VertexShader),
new ShaderSource(ShaderType.PixelShader, Properties.Resources.FragmentShader)
};
shaderProgram = RendererHelper.createShaderProgram(graphics, sources).Value;
// create shader program manually by creating shaders
using (IShader vertexShader = graphics.CreateShader(ShaderType.VertexShader, Properties.Resources.VertexShaderColored).Value,
pixelShader = graphics.CreateShader(ShaderType.PixelShader, Properties.Resources.FragmentShaderColoredUniform).Value)
{
shaderProgramColored = graphics.CreateShaderProgram(new IShader[] { vertexShader, pixelShader }).Value;
}
// create textured shader
ShaderSource[] sourcesTexture =
{
new ShaderSource(ShaderType.VertexShader, Properties.Resources.VertexShaderTex),
new ShaderSource(ShaderType.PixelShader, Properties.Resources.FragmentShaderTex)
};
shaderProgramTextured = RendererHelper.createShaderProgram(graphics, sourcesTexture).Value;
// Diffuse textures mostly srgb, normals mostly normal rgb
// create texture
var settings = new TextureSettings2D(TextureTargetFormat.SRGB8, TextureOriginalFormat.BGR, TextureWrapMode.MirroredRepeat,
TextureWrapMode.MirroredRepeat, TextureMinifyingFilter.Linear, TextureMagnifyingFilter.Linear, Maybe <Color <float> > .Nothing);
brickTexture = graphics.CreateTexture2D(settings, @"Resources\BrickGroutless0095_2_XL.jpg").Value;
mossTexture = graphics.CreateTexture2D(settings, @"Resources\Moss0177_1_XL.jpg").Value;
sampler1 = shaderProgramTextured.GetUniform <int>("tex");
sampler2 = shaderProgramTextured.GetUniform <int>("tex2");
// use uniform values for shaders
multiplicator = shaderProgramColored.GetUniform <float>("multiplicator");
uniformValue = 0.0f;
shaderProgramColored.SetUniform(multiplicator, uniformValue);
CreateVertexBuffer1();
CreateVertexBuffer2();
CreateVertexBuffer3();
renderer.ClearColor(new Color <float>(0.2f, 0.1f, 0.2f, 0.1f));
renderer.Viewport(new Vec2 <short>(0, 0), new Size <short>((short)Width, (short)Height));
}