/// <summary>
/// Initialize the creation of these core vertex programs.
/// </summary>
public static void Initialize()
{
// only need to initialize once
if (!isInitialized)
{
string syntax = "";
// flags for which of the programs use finite extrusion
bool[] vertexProgramFinite =
new bool[] { false, false, false, false, true, true, true, true };
// flags for which of the programs use debug rendering
bool[] vertexProgramDebug =
new bool[] { false, true, false, true, false, true, false, true };
// types of lights that each of the programs target
LightType[] vertexProgramLightTypes =
new LightType[] {
LightType.Point, LightType.Point,
LightType.Directional, LightType.Directional,
LightType.Point, LightType.Point,
LightType.Directional, LightType.Directional
};
// load hardware extrusion programs for point & dir lights
if (GpuProgramManager.Instance.IsSyntaxSupported("arbvp1"))
{
syntax = "arbvp1";
}
else if (GpuProgramManager.Instance.IsSyntaxSupported("vs_1_1"))
{
syntax = "vs_1_1";
}
else
{
throw new AxiomException("Vertex programs are supposedly supported, but neither arbvp1 nor vs_1_1 syntaxes are supported.");
}
// create the programs
for (int i = 0; i < programNames.Length; i++)
{
// sanity check to make sure it doesn't already exist
if (GpuProgramManager.Instance.GetByName(programNames[i]) == null)
{
string source = ShadowVolumeExtrudeProgram.GetProgramSource(
vertexProgramLightTypes[i], syntax, vertexProgramFinite[i], vertexProgramDebug[i]);
// create the program from the static source
GpuProgram program =
GpuProgramManager.Instance.CreateProgramFromString(
programNames[i], source, GpuProgramType.Vertex, syntax);
// load the program
program.Load();
}
}
isInitialized = true;
}
}
/// <summary>
/// Load this usage (and ensure program is loaded).
/// </summary>
internal void Load()
{
// only load the program if it isn't already loaded
if (!program.IsLoaded)
{
program.Load();
}
}
/// <summary>
/// Implementation of Resource.Load.
/// </summary>
protected override void LoadImpl()
{
if (IsSupported)
{
// polymorphic load
LoadHighLevelImpl();
// polymorphic creation of the low level program
CreateLowLevelImpl();
Debug.Assert(assemblerProgram != null, "Subclasses of HighLevelGpuProgram MUST initialize the low level assembler program.");
// load the low level assembler program
if (assemblerProgram != null)
{
assemblerProgram.Load();
isLoaded = true;
}
}
}
