# | Line 48 | Line 48 | typedef float COLOR[3]; /* red, green, blue */ | |
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48 | #define normbright(c) (int)((67L*(c)[RED]+168L*(c)[GRN]+21L*(c)[BLU])/256) | |
49 | #endif | |
50 | ||
51 | + | #define luminance(col) (683.0 * bright(col)) |
52 | + | |
53 | #define intens(col) ( (col)[0] > (col)[1] \ | |
54 | ? (col)[0] > (col)[2] ? (col)[0] : (col)[2] \ | |
55 | : (col)[1] > (col)[2] ? (col)[1] : (col)[2] ) |
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