/// <summary>
/// Add a new point lights to the render.
/// </summary>
/// <param name="pointLight">Point light to be added.</param>
private void AddPointLight(PointLight pointLight)
{
// Set the G-Buffer parameters
_pointLightEffect.Parameters["colorMap"].SetValue(_colorTarget);
_pointLightEffect.Parameters["normalMap"].SetValue(_normalTarget);
_pointLightEffect.Parameters["depthMap"].SetValue(_depthTarget);
// Compute the light world, view and projection matrix
_pointLightEffect.Parameters["World"].SetValue(
Matrix.CreateScale(pointLight.lightRadius) *
Matrix.CreateTranslation(pointLight.lightPosition));
_pointLightEffect.Parameters["View"].SetValue(CameraManager.ActiveCamera.View);
_pointLightEffect.Parameters["Projection"].SetValue(CameraManager.ActiveCamera.Projection);
_pointLightEffect.Parameters["cameraPosition"].SetValue(CameraManager.ActiveCamera.Position);
_pointLightEffect.Parameters["InvertViewProjection"].SetValue(
Matrix.Invert(CameraManager.ActiveCamera.View *
CameraManager.ActiveCamera.Projection));
// Set the position, color, radius, intensity and half pixel
_pointLightEffect.Parameters["lightPosition"].SetValue(pointLight.lightPosition);
_pointLightEffect.Parameters["Color"].SetValue(pointLight.color.ToVector3());
_pointLightEffect.Parameters["lightRadius"].SetValue(pointLight.lightRadius);
_pointLightEffect.Parameters["lightIntensity"].SetValue(pointLight.LightIntensity);
_pointLightEffect.Parameters["halfPixel"].SetValue(_halfPixel);
// Calculate the distance between the camera and light center
float cameraToCenter = Vector3.Distance(CameraManager.ActiveCamera.Position,
pointLight.lightPosition);
// If we are inside the light volume, draw the sphere's inside face
if (cameraToCenter < pointLight.lightRadius)
{
EngineManager.GameGraphicsDevice.RasterizerState = RasterizerState.CullClockwise;
}
else
{
EngineManager.GameGraphicsDevice.RasterizerState = RasterizerState.CullCounterClockwise;
}
EngineManager.GameGraphicsDevice.DepthStencilState = DepthStencilState.None;
// Draw the point light effect
_pointLightEffect.Techniques[0].Passes[0].Apply();
foreach (ModelMesh mesh in ModelManager.GetModel("Sphere").Model.Meshes)
{
foreach (ModelMeshPart meshPart in mesh.MeshParts)
{
EngineManager.GameGraphicsDevice.Indices = meshPart.IndexBuffer;
EngineManager.GameGraphicsDevice.SetVertexBuffer(meshPart.VertexBuffer);
EngineManager.GameGraphicsDevice.DrawIndexedPrimitives(
PrimitiveType.TriangleList,
0, 0,
meshPart.NumVertices,
meshPart.StartIndex,
meshPart.PrimitiveCount);
}
}
EngineManager.GameGraphicsDevice.RasterizerState = RasterizerState.CullCounterClockwise;
EngineManager.GameGraphicsDevice.DepthStencilState = DepthStencilState.Default;
}
/// <summary>
/// Load all the neccessary elements of the renderer, including render targets,
/// point and spot lights.
/// </summary>
public void LoadContent()
{
// Calculate the halfPixel value
_halfPixel = new Vector2()
{
X = 0.5f / (float)EngineManager.GameGraphicsDevice.PresentationParameters.BackBufferWidth,
Y = 0.5f / (float)EngineManager.GameGraphicsDevice.PresentationParameters.BackBufferHeight
};
_quadRenderer.LoadContent();
// Create the Render Targets in which will render the objects
PresentationParameters pp = EngineManager.GameGraphicsDevice.PresentationParameters;
int width = pp.BackBufferWidth;
int height = pp.BackBufferHeight;
SurfaceFormat format = pp.BackBufferFormat;
_colorTarget = new RenderTarget2D(EngineManager.GameGraphicsDevice, width, height, false,
SurfaceFormat.Color, pp.DepthStencilFormat, pp.MultiSampleCount,
RenderTargetUsage.PreserveContents);
_normalTarget = new RenderTarget2D(EngineManager.GameGraphicsDevice, width, height, false,
SurfaceFormat.Color, pp.DepthStencilFormat, pp.MultiSampleCount,
RenderTargetUsage.PreserveContents);
_depthTarget = new RenderTarget2D(EngineManager.GameGraphicsDevice, width, height, false,
SurfaceFormat.Single, pp.DepthStencilFormat, pp.MultiSampleCount,
RenderTargetUsage.PreserveContents);
_lightsTarget = new RenderTarget2D(EngineManager.GameGraphicsDevice, width, height, false,
SurfaceFormat.Color, pp.DepthStencilFormat, pp.MultiSampleCount,
RenderTargetUsage.PreserveContents);
// Load the effects to be used in the deferred rendering
_renderGBuffer = EngineManager.ContentManager.Load <Effect>("Content/Effects/RenderGBuffer");
_directionalLightEffect = EngineManager.ContentManager.Load <Effect>("Content/Effects/DirectionalLight");
_finalCombineEffect = EngineManager.ContentManager.Load <Effect>("Content/Effects/CombineFinal");
_pointLightEffect = EngineManager.ContentManager.Load <Effect>("Content/Effects/PointLight");
// Create the point lights in the scene
_pointLights = new PointLight[4];
_pointLights[0] = new PointLight();
_pointLights[0].lightPosition = new Vector3(0, 10, 5);
_pointLights[0].color = Color.White;
_pointLights[0].lightRadius = 15;
_pointLights[0].LightIntensity = 5;
_pointLights[1] = new PointLight();
_pointLights[1].lightPosition = new Vector3(10, 10, 5);
_pointLights[1].color = Color.White;
_pointLights[1].lightRadius = 15;
_pointLights[1].LightIntensity = 5;
_pointLights[2] = new PointLight();
_pointLights[2].lightPosition = new Vector3(20, 10, 5);
_pointLights[2].color = Color.White;
_pointLights[2].lightRadius = 15;
_pointLights[2].LightIntensity = 5;
_pointLights[3] = new PointLight();
_pointLights[3].lightPosition = new Vector3(25, 25, -25);
_pointLights[3].color = Color.White;
_pointLights[3].lightRadius = 50;
_pointLights[3].LightIntensity = 50;
// Create the spot lights in the scene
_spotLights = new SpotLight[3];
_spotLights[0] = new SpotLight();
_spotLights[0].Position = new Vector3(0, 10, 5);
_spotLights[0].Direction = new Vector3(0, -1, -1);
_spotLights[0].Strength = 0.7f;
_spotLights[0].ConeAngle = 0.5f;
_spotLights[0].ConeDelay = 2.0f;
_spotLights[1] = new SpotLight();
_spotLights[1].Position = new Vector3(10, 10, 0);
_spotLights[1].Direction = new Vector3(10, 0, 0);
_spotLights[1].Strength = 0.7f;
_spotLights[1].ConeAngle = 0.5f;
_spotLights[1].ConeDelay = 2.0f;
_spotLights[2] = new SpotLight();
_spotLights[2].Position = new Vector3(20, 10, 0);
_spotLights[2].Direction = new Vector3(20, 0, 0);
_spotLights[2].Strength = 0.7f;
_spotLights[2].ConeAngle = 0.5f;
_spotLights[2].ConeDelay = 2.0f;
}
