/// <summary>
/// Creates the VertexPositionTexture array and uv maps the vertices.
/// </summary>
/// <param name="vertices">The vertices to map.</param>
/// <returns>The VertexPositionTexture array.</returns>
private static VertexPositionDualTexture[] CreateUVMap(List <Vector3> vertices)
{
VertexPositionDualTexture[] vertexArray = new VertexPositionDualTexture[vertices.Count];
float minX = vertices.OrderBy(v => v.X).ToArray()[0].X;
float minZ = vertices.OrderBy(v => v.X).ToArray()[0].Z;
float maxX = vertices.OrderByDescending(v => v.X).ToArray()[0].X;
float maxZ = vertices.OrderByDescending(v => v.X).ToArray()[0].Z;
float absX = Math.Abs(minX);
float absZ = Math.Abs(maxZ);
for (int i = 0; i < vertices.Count; i++)
{
VertexPositionDualTexture vertex = new VertexPositionDualTexture();
vertex.Position = vertices[i];
vertex.Texture1 = new Vector2(vertices[i].X + absX, vertices[i].Z + absZ);
vertex.Texture2 = new Vector2(MathUtils.NormalizeData(minX, maxX, vertices[i].X), MathUtils.NormalizeData(minZ, maxZ, vertices[i].Z));
vertexArray[i] = vertex;
}
return(vertexArray);
}
/// <summary>
/// Refresh the quad mesh
/// </summary>
private void RefreshQuadMesh()
{
if (this.quadMesh != null)
{
this.GraphicsDevice.DestroyIndexBuffer(this.quadMesh.IndexBuffer);
this.GraphicsDevice.DestroyVertexBuffer(this.quadMesh.VertexBuffer);
this.quadMesh = null;
}
if (this.texcoord1 == null)
{
this.texcoord1 = new Vector2[4]
{
new Vector2(0, 0),
new Vector2(1, 0),
new Vector2(1, 1),
new Vector2(0, 1),
};
}
if (this.texcoord2 == null)
{
this.texcoord2 = new Vector2[4]
{
new Vector2(0, 0),
new Vector2(1, 0),
new Vector2(1, 1),
new Vector2(0, 1),
};
}
Vector2 origin = this.Transform2D.Origin;
float halfWidth = this.Transform2D.Rectangle.Width;
float halfHeight = this.Transform2D.Rectangle.Height;
float originCorrectionWidth = origin.X * halfWidth;
float originCorrectionHeight = origin.Y * halfHeight;
float opacity = this.Transform2D.GlobalOpacity;
Color color = new Color(opacity, opacity, opacity, opacity);
VertexPositionDualTexture[] vertices = new VertexPositionDualTexture[4];
vertices[0].Position = new Vector3(-originCorrectionWidth, -originCorrectionHeight, 0);
vertices[0].TexCoord = this.texcoord1[0];
vertices[0].TexCoord2 = this.texcoord2[0];
vertices[1].Position = new Vector3(halfWidth - originCorrectionWidth, -originCorrectionHeight, 0);
vertices[1].TexCoord = this.texcoord1[1];
vertices[1].TexCoord2 = this.texcoord2[1];
vertices[2].Position = new Vector3(halfWidth - originCorrectionWidth, halfHeight - originCorrectionHeight, 0);
vertices[2].TexCoord = this.texcoord1[2];
vertices[2].TexCoord2 = this.texcoord2[2];
vertices[3].Position = new Vector3(-originCorrectionWidth, halfHeight - originCorrectionHeight, 0);
vertices[3].TexCoord = this.texcoord1[3];
vertices[3].TexCoord2 = this.texcoord2[3];
VertexBuffer vertexBuffer = new VertexBuffer(VertexPositionDualTexture.VertexFormat);
vertexBuffer.SetData(vertices, 4);
ushort[] indices = new ushort[6];
indices[0] = 0;
indices[1] = 1;
indices[2] = 2;
indices[3] = 2;
indices[4] = 3;
indices[5] = 0;
IndexBuffer indexBuffer = new IndexBuffer(indices);
// create the quad
this.quadMesh = new Mesh(0, 4, 0, 2, vertexBuffer, indexBuffer, PrimitiveType.TriangleList);
}
