public void Render(DeviceContext context, Camera camera, Int2 screenResolution, Span <TInstance> instances, int start, int count)
{
var vertexConstantsData = new RayTracedVertexConstants
{
Projection = Matrix.Transpose(camera.Projection), //compensate for the shader packing.
CameraPosition = camera.Position,
CameraRight = camera.Right,
NearClip = camera.NearClip,
CameraUp = camera.Up,
CameraBackward = camera.Backward,
};
vertexConstants.Update(context, ref vertexConstantsData);
var viewportHeight = 2 * (float)Math.Tan(camera.FieldOfView / 2);
var viewportWidth = viewportHeight * camera.AspectRatio;
var pixelConstantsData = new RayTracedPixelConstants
{
CameraRight = camera.Right,
NearClip = camera.NearClip,
CameraUp = camera.Up,
FarClip = camera.FarClip,
CameraBackward = camera.Backward,
PixelSizeAtUnitPlane = new Vector2(viewportWidth / screenResolution.X, viewportHeight / screenResolution.Y)
};
pixelConstants.Update(context, ref pixelConstantsData);
//This assumes that render states have been set appropriately for opaque rendering.
context.InputAssembler.InputLayout = null;
context.InputAssembler.SetIndexBuffer(indices);
context.InputAssembler.PrimitiveTopology = SharpDX.Direct3D.PrimitiveTopology.TriangleList;
context.VertexShader.Set(vertexShader);
context.VertexShader.SetConstantBuffer(0, vertexConstants.Buffer);
context.VertexShader.SetShaderResource(0, this.instances.SRV);
context.PixelShader.Set(pixelShader);
context.PixelShader.SetConstantBuffer(1, pixelConstants.Buffer);
while (count > 0)
{
var batchCount = Math.Min(this.instances.Capacity, count);
this.instances.Update(context, instances, batchCount, start);
context.DrawIndexed(batchCount * 36, 0, 0);
count -= batchCount;
start += batchCount;
}
}
public void Render(Camera camera, Int2 screenResolution, Span <TInstance> instances, int start, int count)
{
Use();
indices.Bind();
vertexConstants.Bind(0);
this.instances.Bind(0);
pixelConstants.Bind(1);
var vertexConstantsData = new RayTracedVertexConstants {
Projection = camera.Projection,
CameraPosition = camera.Position,
CameraRight = camera.Right,
NearClip = camera.NearClip,
CameraUp = camera.Up,
CameraBackward = camera.Backward,
};
vertexConstants.Update(ref vertexConstantsData);
var viewportHeight = 2 * (float)Math.Tan(camera.FieldOfView / 2);
var viewportWidth = viewportHeight * camera.AspectRatio;
var pixelConstantsData = new RayTracedPixelConstants {
CameraRight = camera.Right,
NearClip = camera.NearClip,
CameraUp = camera.Up,
FarClip = camera.FarClip,
CameraBackward = camera.Backward,
PixelSizeAtUnitPlane = new Vector2(viewportWidth / screenResolution.X, viewportHeight / screenResolution.Y)
};
pixelConstants.Update(ref pixelConstantsData);
while (count > 0)
{
var batchCount = Math.Min(this.instances.Capacity, count);
this.instances.Update(instances, batchCount, start);
GL.DrawElements(PrimitiveType.Triangles, 36 * batchCount, indices.Type, 0);
count -= batchCount;
start += batchCount;
}
}
