private void DrawTextureCube(Camera camera)
{
var shader = ShaderContainer.GetShader("RTextureCube");
shader.UseProgram();
if (skyBox == null)
{
var shape = ShapeGenerator.GetCubePositions(Vector3.Zero, 2.0f);
skyBox = new Mesh3D(shape.Item1.Select(v => new Vertex3d(v.X, v.Y, v.Z)).ToArray(), shape.Item2);
}
// Use nearest neighbor to preserve pixel boundaries.
if (sampler == null)
{
sampler = new SamplerObject {
MagFilter = TextureMagFilter.Nearest, MinFilter = TextureMinFilter.Nearest
}
}
;
// Texture unit 0 should be reserved for image preview.
sampler.Bind(0);
shader.SetTexture("image", Texture, 0);
// Use the existing rotation matrix to support changing the view.
shader.SetMatrix4x4("mvpMatrix", camera.RotationMatrix * Matrix4.CreatePerspectiveFieldOfView(1.5708f, camera.RenderWidth / (float)camera.RenderHeight, 0.01f, 10.0f));
// The colors need to be converted back to sRGB gamma.
shader.SetBoolToInt("isSrgb", IsSrgb);
// Disable culling since only the backside will be visible.
GL.Disable(EnableCap.CullFace);
skyBox.Draw(shader);
}
}
