public void BackgroundThreadTask(object temp)
{
fastCameraBoundingFrustum = new Engine.Utilities.FastFrustum(ref viewProj);
DoCulling(ref fastCameraBoundingFrustum);
sun.CalcCascades(ref view, ref projection, nearClip, farClip, clipRange);
}
// run from another thread during update to calc the view projection matrix and do culling
public void CalcCascades(ref Matrix view, ref Matrix projection, float nearClip, float farClip, float clipRange)
{
// Get the corners of the frustum
BoundingFrustum cameraFrustum = new BoundingFrustum(view * projection);
cameraFrustum.GetCorners(frustumCornersWS);
Matrix eyeTransform = view;
Vector3.Transform(frustumCornersWS, ref eyeTransform, frustumCornersVS);
// Get camera near and far values
float near = nearClip;
float far = MathHelper.Min(farClip, ShadowDistance);
splitDepthsTmp[0] = near;
splitDepthsTmp[NUM_CASCADES] = far;
// Compute cascade split depths
for (int i = 1; i < splitDepthsTmp.Length - 1; i++)
splitDepthsTmp[i] = near + (far - near) * (float)Math.Pow((i / (float)NUM_CASCADES), 2);
//splitDepthsTmp[1] = 35.0f;
for (int i = 0; i < NUM_CASCADES; i++)
{
// Convert the split depths to percent of view range, so we can pass them to shader later
LightClipPlanes[i].X = (splitDepthsTmp[i] - nearClip) / clipRange;
LightClipPlanes[i].Y = (splitDepthsTmp[i + 1] - nearClip) / clipRange;
// Create the view projection matrix for this cascade
LightViewProjectionMatrices[i] = CreateLightViewProjectionMatrix(directionToSun, far, splitDepthsTmp[i], splitDepthsTmp[i + 1], i);
LightFrustums[i] = new Engine.Utilities.FastFrustum(ref LightViewProjectionMatrices[i]);
}
Renderer.Instance.DoShadowsCulling(LightFrustums);
}
