Vertex Shader Assembly

This example is from exercise 1.

        // Definition of the vertex shader, declarations then assembly.
        VertexShader =
        decl
        {
            stream 0;
            float v0[3];        // Position
            float v3[3];        // Normal
            float v7[3];        // Texture Coord1
            float v8[3];        // Texture coord2
        }   
        asm
        {
            vs.1.1             // version number

            m4x4 oPos, v0, c4  // transform point to projection space
            
            m3x3 r0,v3,c0      // transform Normal to World Space, put result into r0
            
            dp3  r0,r0,-c16    // Dot product against light, r0 now has lighting
                               //  constant in x,y and z components (r,g,b)
            
            mul  r0,r0,c13     // modulate against diffuse light color
	            
            mov oD0,r0         // put into Diffuse Color output
        };