How do I draw a polygon?

To draw a polygon you have to create a vertex buffer. A vertex buffer is a Direct3D object used to store vertices. Vertices can be defined any way we want by defining a custom structure and a custom FVF (Flexible Vertex Format). Here is an example application "Triangle.zip" that uses vertices that are transformed (Vertices which are already in 2D window coordinates) and lit (meaning we are not using Direct3D lighting, but are supplying our own colors). After creating the VertexBuffer and writing data into it we have to

1. Set the Stream source as our vertex buffer
2. Set our Custom FVF as the Vertex Shader
3. Draw the Polygon(Here triangle) using DrawPrimitive call (To draw any complicated geometry first it is splitted into primitives like triangles or quads(Rectangular surfaces))

FAQ Menu

 

Advertisement

Free Magazine