Q3ColorRGB_Subtract (IM: QD3D)

Inside Macintosh: 3D Graphics Programming With QuickDraw 3D /

Chapter 21 - QuickDraw 3D Color Utilities / QuickDraw 3D Color Utilities Reference

Q3ColorRGB_Subtract
You can use the Q3ColorRGB_Subtract function to subtract one color from another.
TQ3ColorRGB *Q3ColorRGB_Subtract (
const TQ3ColorRGB *c1, 
const TQ3ColorRGB *c2, 
TQ3ColorRGB *result);
c1
An RGB color structure.
c2
An RGB color structure.
result
On exit, a pointer to an RGB color structure for the color that is the difference of the two specified colors.

DESCRIPTION
The Q3ColorRGB_Subtract function returns, as its function result and in the result parameter, a pointer to an RGB color structure that represents the result of subtracting the color specified by the c2 parameter from the color specified by the c1 parameter.