public void BindSourceImage(TextureArray2D texture, Sampler sampler, int id)
{
sampler.Bind(TextureBindingStart + id);
texture.Bind(TextureBindingStart + id);
// set srgb variable
shader.Bind();
GL.Uniform1(TextureSrgbStart + id, texture.IsSrgb?1:0);
}
public static Reaction <T> BindSamplers <T> (this Reaction <T> render,
Func <T, IDictionary <Sampler, Texture> > getBindings)
{
return(input =>
{
var bindings = getBindings(input);
Sampler.Bind(bindings);
var result = render(input);
Sampler.Unbind(bindings);
return result;
});
}
private void Render(Camera camera, CascadedShadowUniforms shadowSource)
{
lighting.UpdateDirectionalLight(camera);
shadows.viewLightMatrices &= !shadowSource.viewLightMatrices;
//shadows.lightSpaceMatrix &= !shadowSource.lightSpaceMatrix;
foreach (var mesh in camera.NodesInView <Mesh <EntityVertex> > ())
{
Sampler.Bind(!samplers, mesh.Textures);
transforms.UpdateModelViewAndNormalMatrices(camera.WorldToCamera * mesh.Transform);
_entityShader.DrawElements(PrimitiveType.Triangles, mesh.VertexBuffer, mesh.IndexBuffer);
Sampler.Unbind(!samplers, mesh.Textures);
}
}
private void OnLoad(object sender, EventArgs e)
{
// load texture from file
using (var bitmap = new Bitmap("Data/Textures/checker.jpg"))
{
BitmapTexture.CreateCompatible(bitmap, out _texture);
_texture.LoadBitmap(bitmap);
}
_texture.GenerateMipMaps();
// initialize sampler
_sampler = new Sampler();
_sampler.SetWrapMode(TextureWrapMode.Repeat);
// create vertex data for a big plane
const int a = 10;
const int b = 10;
var vertices = new[]
{
new Vertex(-a, 0, -a, 0, 0),
new Vertex(a, 0, -a, b, 0),
new Vertex(-a, 0, a, 0, b),
new Vertex(a, 0, a, b, b)
};
// create buffer object and upload vertex data
_vbo = new Buffer <Vertex>();
_vbo.Init(BufferTarget.ArrayBuffer, vertices);
// initialize shader
_program = ProgramFactory.Create <SimpleTextureProgram>();
// activate shader program
_program.Use();
// bind sampler
_sampler.Bind(TextureUnit.Texture0);
// bind texture
_program.Texture.BindTexture(TextureUnit.Texture0, _texture);
// which is equivalent to
//_program.Texture.Set(TextureUnit.Texture0);
//_texture.Bind(TextureUnit.Texture0);
// set up vertex array and attributes
_vao = new VertexArray();
_vao.Bind();
// memory layout of our data is XYZUVXYZUV...
// the buffer abstraction knows the total size of one "pack" of vertex data
// and if a vertex attribute is bound without further arguments the first N elements are taken from each pack
// where N is provided via the VertexAttribAttribute on the program property:
_vao.BindAttribute(_program.InPosition, _vbo);
// if data should not be taken from the start of each pack, the offset must be given in bytes
// to reach the texture coordinates UV the XYZ coordinates must be skipped, that is 3 floats, i.e. an offset of 12 bytes is needed
_vao.BindAttribute(_program.InTexCoord, _vbo, 12);
// if needed all the available arguments can be specified manually, e.g.
//_vao.BindAttribute(_program.InTexCoord, _vbo, 2, VertexAttribPointerType.Float, Marshal.SizeOf(typeof(Vertex)), 12, false);
// set default camera
Camera.DefaultState.Position = new Vector3(0, 0.5f, 3);
Camera.ResetToDefault();
// set a nice clear color
GL.ClearColor(Color.MidnightBlue);
}
public void Render(Texture heightmap, Sampler heightmapSampler)
{
gb.Render(() =>
{
heightmapSampler.Bind(TextureUnit.Texture0);
},
(sp) =>
{
sp.SetUniform("heightmap", 0);
sp.SetUniform("texsize", (float)heightmap.Width);
});
}