public void AddVertex(MeshVertex vertex)
{
var index = this.Vertices.FindIndex((vert) => { return vert == vertex; });
if (index < 0)
{
index = this.Vertices.Count;
this.Vertices.Add(vertex);
}
this.Indices.Add((ushort)index);
}
public void AddPlane(float width, float height, int slicesX, int slicesY, Color4 color)
{
float stepX = width / (float)(slicesX + 1);
float stepY = height / (float)(slicesY + 1);
Vector3 normal = new Vector3(0.0f, 1.0f, 0.0f);
for (int y = 0; y < slicesY; y++)
{
for (int x = 0; x < slicesX; x++)
{
var pos1 = new Vector3((x + 0) * stepX, 0.0f, (y + 0) * stepY);
var pos2 = new Vector3((x + 1) * stepX, 0.0f, (y + 0) * stepY);
var pos3 = new Vector3((x + 1) * stepX, 0.0f, (y + 1) * stepY);
var pos4 = new Vector3((x + 0) * stepX, 0.0f, (y + 1) * stepY);
var v1 = new MeshVertex() { Position = pos1, TexCoord = new Vector2(0.0f, 0.0f), Color = color, Normal = normal };
var v2 = new MeshVertex() { Position = pos2, TexCoord = new Vector2(1.0f, 0.0f), Color = color, Normal = normal };
var v3 = new MeshVertex() { Position = pos3, TexCoord = new Vector2(1.0f, 1.0f), Color = color, Normal = normal };
var v4 = new MeshVertex() { Position = pos4, TexCoord = new Vector2(0.0f, 1.0f), Color = color, Normal = normal };
this.AddQuad(v1, v2, v3, v4);
}
}
}
public void AddQuad(MeshVertex v1, MeshVertex v2, MeshVertex v3, MeshVertex v4)
{
switch (RenderPrimitive)
{
case PrimitiveType.Points:
AddVertex(v1);
AddVertex(v2);
AddVertex(v3);
AddVertex(v4);
break;
case PrimitiveType.Lines:
AddLine(v1, v2);
AddLine(v2, v3);
AddLine(v3, v4);
AddLine(v4, v1);
break;
case PrimitiveType.Triangles:
AddVertex(v1);
AddVertex(v2);
AddVertex(v3);
AddVertex(v1);
AddVertex(v3);
AddVertex(v4);
break;
}
}
public void AddLine(MeshVertex v1, MeshVertex v2)
{
if (RenderPrimitive == PrimitiveType.Triangles)
return;
AddVertex(v1);
AddVertex(v2);
}