; Perform directional lighting calculations

#pragma screenspace

xvs.1.1

; write the "ramp" function for directional lights (always one)
mov r11, c[a0.x + LIGHT_COLOR].xyz
mov r3, c[a0.x + LIGHT_DIRECTION]

; Set a0.x to next light (if any)
mov r5.x, c[a0.x + LIGHT_SIZE].w
mov a0.x, r5.x