public IEnumerator GetShadowVolumeRenderableIterator(ShadowTechnique shadowTechnique, Light light,
HardwareIndexBuffer indexBuffer, bool extrudeVertices,
float extrusionDistance, ulong flags)
{
Debug.Assert(indexBuffer != null, "Only external index buffers are supported right now");
Debug.Assert(indexBuffer.Type == IndexType.Size16, "Only 16-bit indexes supported for now");
// Calculate the object space light details
var lightPos = light.GetAs4DVector();
var world2Obj = parentNode.FullTransform.Inverse();
lightPos = world2Obj * lightPos;
// We need to search the edge list for silhouette edges
if (this.edgeList == null)
{
throw new Exception("You enabled stencil shadows after the buid process! In " +
"Region.GetShadowVolumeRenderableIterator");
}
// Init shadow renderable list if required
var init = this.shadowRenderables.Count == 0;
RegionShadowRenderable esr = null;
//bool updatedSharedGeomNormals = false;
for (var i = 0; i < this.edgeList.EdgeGroups.Count; i++)
{
var group = (EdgeData.EdgeGroup) this.edgeList.EdgeGroups[i];
if (init)
{
// Create a new renderable, create a separate light cap if
// we're using a vertex program (either for this model, or
// for extruding the shadow volume) since otherwise we can
// get depth-fighting on the light cap
esr = new RegionShadowRenderable(this, indexBuffer, group.vertexData, this.vertexProgramInUse || !extrudeVertices);
this.shadowRenderables.Add(esr);
}
else
{
esr = (RegionShadowRenderable)this.shadowRenderables[i];
}
// Extrude vertices in software if required
if (extrudeVertices)
{
ExtrudeVertices(esr.PositionBuffer, group.vertexData.vertexCount, lightPos, extrusionDistance);
}
}
return((IEnumerator)this.shadowRenderables);
}
public IEnumerator GetShadowVolumeRenderableIterator( ShadowTechnique shadowTechnique, Light light,
HardwareIndexBuffer indexBuffer, bool extrudeVertices,
float extrusionDistance, ulong flags )
{
Debug.Assert( indexBuffer != null, "Only external index buffers are supported right now" );
Debug.Assert( indexBuffer.Type == IndexType.Size16, "Only 16-bit indexes supported for now" );
// Calculate the object space light details
var lightPos = light.GetAs4DVector();
var world2Obj = parentNode.FullTransform.Inverse();
lightPos = world2Obj*lightPos;
// We need to search the edge list for silhouette edges
if ( this.edgeList == null )
{
throw new Exception( "You enabled stencil shadows after the buid process! In " +
"Region.GetShadowVolumeRenderableIterator" );
}
// Init shadow renderable list if required
var init = this.shadowRenderables.Count == 0;
RegionShadowRenderable esr = null;
//bool updatedSharedGeomNormals = false;
for ( var i = 0; i < this.edgeList.EdgeGroups.Count; i++ )
{
var group = (EdgeData.EdgeGroup)this.edgeList.EdgeGroups[ i ];
if ( init )
{
// Create a new renderable, create a separate light cap if
// we're using a vertex program (either for this model, or
// for extruding the shadow volume) since otherwise we can
// get depth-fighting on the light cap
esr = new RegionShadowRenderable( this, indexBuffer, group.vertexData, this.vertexProgramInUse || !extrudeVertices );
this.shadowRenderables.Add( esr );
}
else
{
esr = (RegionShadowRenderable)this.shadowRenderables[ i ];
}
// Extrude vertices in software if required
if ( extrudeVertices )
{
ExtrudeVertices( esr.PositionBuffer, group.vertexData.vertexCount, lightPos, extrusionDistance );
}
}
return (IEnumerator)this.shadowRenderables;
}
