/// <summary>
/// Generate normals for this Element.
/// </summary>
/// <param name="vertexArray">
/// The <see cref="VertexArrayObject"/>
/// </param>
public override void GenerateNormals(VertexArrayObject vertexArray)
{
IVertexArray positionArray = vertexArray.GetVertexArray(VertexArraySemantic.Position);
if (positionArray == null)
{
throw new InvalidOperationException("position semantic not set");
}
IVertexArray normalArray = vertexArray.GetVertexArray(VertexArraySemantic.Normal);
if (normalArray == null)
{
throw new InvalidOperationException("normal semantic not set");
}
if (normalArray.Array == null)
{
throw new InvalidOperationException("normal array not set");
}
if (positionArray.Array != null)
{
positionArray.Array.Map();
}
normalArray.Array.Map();
try {
switch (ElementsMode)
{
case PrimitiveType.Triangles:
switch (positionArray.ArraySection.ItemType)
{
case ArrayBufferItemType.Float3:
GenerateNormalsTriangle3f(positionArray, normalArray);
break;
case ArrayBufferItemType.Float4:
GenerateNormalsTriangle4f(positionArray, normalArray);
break;
default:
throw new NotSupportedException("normals generation not supported for elements of type " + positionArray.ArraySection.ItemType);
}
break;
default:
throw new NotSupportedException("normals generation not supported for primitive " + ElementsMode);
}
} finally {
if (positionArray.Array != null)
{
positionArray.Array.Unmap();
}
normalArray.Array.Unmap();
}
}
/// <summary>
/// Generate texture coordinates for this Element.
/// </summary>
/// <param name="vertexArray">
/// The <see cref="VertexArrayObject"/>
/// </param>
public override void GenerateTexCoord(VertexArrayObject vertexArray, VertexArrayTexGenDelegate genTexCoordCallback)
{
IVertexArray positionArray = vertexArray.GetVertexArray(VertexArraySemantic.Position);
if (positionArray == null)
{
throw new InvalidOperationException("position semantic not set");
}
IVertexArray texArray = vertexArray.GetVertexArray(VertexArraySemantic.TexCoord);
if (texArray == null)
{
throw new InvalidOperationException("texture semantic not set");
}
if (texArray.Array == null)
{
throw new InvalidOperationException("texture array not set");
}
if (positionArray.Array != null)
{
positionArray.Array.Map();
}
texArray.Array.Map();
ArrayIndices.Map();
try {
switch (ElementsMode)
{
case PrimitiveType.Triangles:
case PrimitiveType.TriangleStrip:
switch (positionArray.ArraySection.ItemType)
{
case ArrayBufferItemType.Float3:
GenerateTexCoordsTriangle3f(positionArray, texArray, genTexCoordCallback);
break;
default:
throw new NotSupportedException("normals generation not supported for elements of type " + positionArray.ArraySection.ItemType);
}
break;
default:
throw new NotSupportedException("normals generation not supported for primitive " + ElementsMode);
}
} finally {
if (positionArray.Array != null)
{
positionArray.Array.Unmap();
}
texArray.Array.Unmap();
ArrayIndices.Unmap();
}
}
/// <summary>
/// Generate tangents for this Element.
/// </summary>
/// <param name="vertexArray">
/// The <see cref="VertexArrayObject"/>
/// </param>
public override void GenerateTangents(VertexArrayObject vertexArray)
{
IVertexArray positionArray = vertexArray.GetVertexArray(VertexArraySemantic.Position);
if (positionArray == null)
{
throw new InvalidOperationException("position semantic not set");
}
IVertexArray texArray = vertexArray.GetVertexArray(VertexArraySemantic.TexCoord);
if (texArray == null)
{
throw new InvalidOperationException("texture semantic not set");
}
IVertexArray normalArray = vertexArray.GetVertexArray(VertexArraySemantic.Normal);
if (normalArray == null)
{
throw new InvalidOperationException("normal semantic not set");
}
if (normalArray.Array == null)
{
throw new InvalidOperationException("normal array not set");
}
IVertexArray tanArray = vertexArray.GetVertexArray(VertexArraySemantic.Tangent);
if (tanArray == null)
{
throw new InvalidOperationException("tangent semantic not set");
}
if (tanArray.Array == null)
{
throw new InvalidOperationException("tangent array not set");
}
IVertexArray bitanArray = vertexArray.GetVertexArray(VertexArraySemantic.Bitangent);
if (bitanArray == null)
{
throw new InvalidOperationException("bitangent semantic not set");
}
if (bitanArray.Array == null)
{
throw new InvalidOperationException("bitangent array not set");
}
if (positionArray.Array != null)
{
positionArray.Array.Map();
}
if (texArray.Array != null)
{
texArray.Array.Map();
}
normalArray.Array.Map();
tanArray.Array.Map();
bitanArray.Array.Map();
ArrayIndices.Map();
try {
switch (ElementsMode)
{
case PrimitiveType.TriangleStrip:
switch (positionArray.ArraySection.ItemType)
{
case ArrayBufferItemType.Float3:
GenerateTangentsTriangleStrip3f(positionArray, normalArray, texArray, tanArray, bitanArray);
break;
default:
throw new NotSupportedException("normals generation not supported for elements of type " + positionArray.ArraySection.ItemType);
}
break;
default:
throw new NotSupportedException("normals generation not supported for primitive " + ElementsMode);
}
} finally {
if (positionArray.Array != null)
{
positionArray.Array.Unmap();
}
if (texArray.Array != null)
{
texArray.Array.Unmap();
}
normalArray.Array.Unmap();
tanArray.Array.Unmap();
bitanArray.Array.Unmap();
ArrayIndices.Unmap();
}
}
