public static Mesh Compute(RectangleD rectangle, int numberOfPartitionsX, int numberOfPartitionsY)
{
if (numberOfPartitionsX < 0)
{
throw new ArgumentOutOfRangeException("numberOfPartitionsX");
}
if (numberOfPartitionsY < 0)
{
throw new ArgumentOutOfRangeException("numberOfPartitionsY");
}
Mesh mesh = new Mesh();
mesh.PrimitiveType = PrimitiveType.Triangles;
mesh.FrontFaceWindingOrder = WindingOrder.Counterclockwise;
int numberOfPositions = (numberOfPartitionsX + 1) * (numberOfPartitionsY + 1);
VertexAttributeFloatVector2 positionsAttribute = new VertexAttributeFloatVector2("position", numberOfPositions);
IList <Vector2F> positions = positionsAttribute.Values;
mesh.Attributes.Add(positionsAttribute);
int numberOfIndices = (numberOfPartitionsX * numberOfPartitionsY) * 6;
IndicesUnsignedInt indices = new IndicesUnsignedInt(numberOfIndices);
mesh.Indices = indices;
//
// Positions
//
Vector2D lowerLeft = rectangle.LowerLeft;
Vector2D toUpperRight = rectangle.UpperRight - lowerLeft;
for (int y = 0; y <= numberOfPartitionsY; ++y)
{
double deltaY = y / (double)numberOfPartitionsY;
double currentY = lowerLeft.Y + (deltaY * toUpperRight.Y);
for (int x = 0; x <= numberOfPartitionsX; ++x)
{
double deltaX = x / (double)numberOfPartitionsX;
double currentX = lowerLeft.X + (deltaX * toUpperRight.X);
positions.Add(new Vector2D(currentX, currentY).ToVector2F());
}
}
//
// Indices
//
int rowDelta = numberOfPartitionsX + 1;
int i = 0;
for (int y = 0; y < numberOfPartitionsY; ++y)
{
for (int x = 0; x < numberOfPartitionsX; ++x)
{
indices.AddTriangle(new TriangleIndicesUnsignedInt(i, i + 1, rowDelta + (i + 1)));
indices.AddTriangle(new TriangleIndicesUnsignedInt(i, rowDelta + (i + 1), rowDelta + i));
i += 1;
}
i += 1;
}
return(mesh);
}
public void MeshVertexAttributes()
{
Mesh mesh = new Mesh();
VertexAttributeHalfFloat halfFloatAttribute = new VertexAttributeHalfFloat("halfFloatAttribute");
mesh.Attributes.Add(halfFloatAttribute);
Assert.AreEqual("halfFloatAttribute", mesh.Attributes["halfFloatAttribute"].Name);
Assert.AreEqual(VertexAttributeType.HalfFloat, mesh.Attributes["halfFloatAttribute"].Datatype);
VertexAttributeHalfFloatVector2 halfFloatAttribute2 = new VertexAttributeHalfFloatVector2("halfFloatAttribute2");
mesh.Attributes.Add(halfFloatAttribute2);
Assert.AreEqual("halfFloatAttribute2", mesh.Attributes["halfFloatAttribute2"].Name);
Assert.AreEqual(VertexAttributeType.HalfFloatVector2, mesh.Attributes["halfFloatAttribute2"].Datatype);
VertexAttributeHalfFloatVector3 halfFloatAttribute3 = new VertexAttributeHalfFloatVector3("halfFloatAttribute3");
mesh.Attributes.Add(halfFloatAttribute3);
Assert.AreEqual("halfFloatAttribute3", mesh.Attributes["halfFloatAttribute3"].Name);
Assert.AreEqual(VertexAttributeType.HalfFloatVector3, mesh.Attributes["halfFloatAttribute3"].Datatype);
VertexAttributeHalfFloatVector4 halfFloatAttribute4 = new VertexAttributeHalfFloatVector4("halfFloatAttribute4");
mesh.Attributes.Add(halfFloatAttribute4);
Assert.AreEqual("halfFloatAttribute4", mesh.Attributes["halfFloatAttribute4"].Name);
Assert.AreEqual(VertexAttributeType.HalfFloatVector4, mesh.Attributes["halfFloatAttribute4"].Datatype);
///////////////////////////////////////////////////////////////////
VertexAttributeFloat floatAttribute = new VertexAttributeFloat("floatAttribute");
mesh.Attributes.Add(floatAttribute);
Assert.AreEqual("floatAttribute", mesh.Attributes["floatAttribute"].Name);
Assert.AreEqual(VertexAttributeType.Float, mesh.Attributes["floatAttribute"].Datatype);
VertexAttributeFloatVector2 floatAttribute2 = new VertexAttributeFloatVector2("floatAttribute2");
mesh.Attributes.Add(floatAttribute2);
Assert.AreEqual("floatAttribute2", mesh.Attributes["floatAttribute2"].Name);
Assert.AreEqual(VertexAttributeType.FloatVector2, mesh.Attributes["floatAttribute2"].Datatype);
VertexAttributeFloatVector3 floatAttribute3 = new VertexAttributeFloatVector3("floatAttribute3");
mesh.Attributes.Add(floatAttribute3);
Assert.AreEqual("floatAttribute3", mesh.Attributes["floatAttribute3"].Name);
Assert.AreEqual(VertexAttributeType.FloatVector3, mesh.Attributes["floatAttribute3"].Datatype);
VertexAttributeFloatVector4 floatAttribute4 = new VertexAttributeFloatVector4("floatAttribute4");
mesh.Attributes.Add(floatAttribute4);
Assert.AreEqual("floatAttribute4", mesh.Attributes["floatAttribute4"].Name);
Assert.AreEqual(VertexAttributeType.FloatVector4, mesh.Attributes["floatAttribute4"].Datatype);
///////////////////////////////////////////////////////////////////
VertexAttributeByte byteAttribute = new VertexAttributeByte("byteAttribute");
mesh.Attributes.Add(byteAttribute);
Assert.AreEqual("byteAttribute", mesh.Attributes["byteAttribute"].Name);
Assert.AreEqual(VertexAttributeType.UnsignedByte, mesh.Attributes["byteAttribute"].Datatype);
VertexAttributeRGBA colorAttribute = new VertexAttributeRGBA("colorAttribute");
mesh.Attributes.Add(colorAttribute);
Assert.AreEqual("colorAttribute", mesh.Attributes["colorAttribute"].Name);
Assert.AreEqual(VertexAttributeType.UnsignedByte, mesh.Attributes["colorAttribute"].Datatype);
colorAttribute.AddColor(Color.FromArgb(3, 0, 1, 2));
Assert.AreEqual(0, colorAttribute.Values[0]);
Assert.AreEqual(1, colorAttribute.Values[1]);
Assert.AreEqual(2, colorAttribute.Values[2]);
Assert.AreEqual(3, colorAttribute.Values[3]);
}