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https://github.com/scp-fs2open/fs2open.github.com.git
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FSCyborg
601fa75d50
Travis is complaining about while(0), so we're getting it off of our back by switching to while(false).
171 lines
10 KiB
C
171 lines
10 KiB
C
/*
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* Copyright (C) Volition, Inc. 1999. All rights reserved.
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*
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* All source code herein is the property of Volition, Inc. You may not sell
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* or otherwise commercially exploit the source or things you created based on the
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* source.
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*
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*/
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#ifndef _LINE_H
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#define _LINE_H
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//void gr8_line(int x1,int y1,int x2,int y2, bool b);
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//void gr8_aaline(vertex *v1, vertex *v2);
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#define INT_EXCHG(a,b) do { \
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int __temp__ = (a); \
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(a) = (b); \
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(b) = __temp__; \
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} while(false)
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//#define INT_SCALE(var,arg,num,den) ((var) = ((arg) * (num)) / (den))
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#define INT_SCALE(var,arg,num,den) ((var) = MulDiv(arg, num, den))
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#define INT_CLIPLINE(x1,y1,x2,y2,XMIN,YMIN,XMAX,YMAX,WHEN_OUTSIDE,WHEN_CLIPPED,WHEN_SWAPPED) do { \
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int temp; \
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\
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if(y1 > y2) \
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{ INT_EXCHG(y1,y2); INT_EXCHG(x1,x2); WHEN_SWAPPED; } \
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if((y2 < YMIN) || (y1 > YMAX)) \
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{ WHEN_OUTSIDE; } \
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if(x1 < x2) { \
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if((x2 < XMIN) || (x1 > XMAX)) { \
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WHEN_OUTSIDE; \
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} \
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if(x1 < XMIN) { \
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INT_SCALE(temp,(y2 - y1),(XMIN - x1),(x2 - x1)); \
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if((y1 += temp) > YMAX) { WHEN_OUTSIDE; } \
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x1 = XMIN; \
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WHEN_CLIPPED; \
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} \
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if(x2 > XMAX) { \
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INT_SCALE(temp,(y2 - y1),(x2 - XMAX),(x2 - x1)); \
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if((y2 -= temp) < YMIN) { WHEN_OUTSIDE; } \
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x2 = XMAX; \
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WHEN_CLIPPED; \
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} \
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if(y1 < YMIN) { \
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INT_SCALE(temp,(x2 - x1),(YMIN - y1),(y2 - y1)); \
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x1 += temp; \
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y1 = YMIN; \
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WHEN_CLIPPED; \
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} \
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if(y2 > YMAX) { \
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INT_SCALE(temp,(x2 - x1),(y2 - YMAX),(y2 - y1)); \
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x2 -= temp; \
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y2 = YMAX; \
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WHEN_CLIPPED; \
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} \
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} \
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else { \
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if((x1 < XMIN) || (x2 > XMAX)) { \
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WHEN_OUTSIDE; \
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} \
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if(x1 > XMAX) { \
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INT_SCALE(temp,(y2 - y1),(x1 - XMAX),(x1 - x2)); \
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if((y1 += temp) > YMAX) { WHEN_OUTSIDE; } \
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x1 = XMAX; \
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WHEN_CLIPPED; \
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} \
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if(x2 < XMIN) { \
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INT_SCALE(temp,(y2 - y1),(XMIN - x2),(x1 - x2)); \
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if((y2 -= temp) < YMIN) { WHEN_OUTSIDE; } \
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x2 = XMIN; \
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WHEN_CLIPPED; \
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} \
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if(y1 < YMIN) { \
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INT_SCALE(temp,(x1 - x2),(YMIN - y1),(y2 - y1)); \
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x1 -= temp; \
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y1 = YMIN; \
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WHEN_CLIPPED; \
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} \
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if(y2 > YMAX) { \
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INT_SCALE(temp,(x1 - x2),(y2 - YMAX),(y2 - y1)); \
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x2 += temp; \
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y2 = YMAX; \
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WHEN_CLIPPED; \
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} \
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} \
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} while(false)
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#define FL_EXCHG(a,b) do { \
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float __temp__ = (a); \
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(a) = (b); \
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(b) = __temp__; \
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} while(false)
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#define FL_SCALE(var,arg,num,den) ((var) = ((arg) * (num)) / (den))
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#define FL_CLIPLINE(x1,y1,x2,y2,XMIN,YMIN,XMAX,YMAX,WHEN_OUTSIDE,WHEN_CLIPPED,WHEN_SWAPPED) do { \
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float temp; \
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\
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if(y1 > y2) \
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{ FL_EXCHG(y1,y2); FL_EXCHG(x1,x2); WHEN_SWAPPED; } \
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if((y2 < YMIN) || (y1 > YMAX)) \
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{ WHEN_OUTSIDE; } \
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if(x1 < x2) { \
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if((x2 < XMIN) || (x1 > XMAX)) { \
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WHEN_OUTSIDE; \
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} \
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if(x1 < XMIN) { \
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FL_SCALE(temp,(y2 - y1),(XMIN - x1),(x2 - x1)); \
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if((y1 += temp) > YMAX) { WHEN_OUTSIDE; } \
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x1 = XMIN; \
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WHEN_CLIPPED; \
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} \
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if(x2 > XMAX) { \
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FL_SCALE(temp,(y2 - y1),(x2 - XMAX),(x2 - x1)); \
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if((y2 -= temp) < YMIN) { WHEN_OUTSIDE; } \
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x2 = XMAX; \
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WHEN_CLIPPED; \
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} \
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if(y1 < YMIN) { \
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FL_SCALE(temp,(x2 - x1),(YMIN - y1),(y2 - y1)); \
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x1 += temp; \
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y1 = YMIN; \
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WHEN_CLIPPED; \
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} \
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if(y2 > YMAX) { \
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FL_SCALE(temp,(x2 - x1),(y2 - YMAX),(y2 - y1)); \
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x2 -= temp; \
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y2 = YMAX; \
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WHEN_CLIPPED; \
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} \
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} \
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else { \
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if((x1 < XMIN) || (x2 > XMAX)) { \
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WHEN_OUTSIDE; \
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} \
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if(x1 > XMAX) { \
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FL_SCALE(temp,(y2 - y1),(x1 - XMAX),(x1 - x2)); \
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if((y1 += temp) > YMAX) { WHEN_OUTSIDE; } \
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x1 = XMAX; \
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WHEN_CLIPPED; \
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} \
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if(x2 < XMIN) { \
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FL_SCALE(temp,(y2 - y1),(XMIN - x2),(x1 - x2)); \
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if((y2 -= temp) < YMIN) { WHEN_OUTSIDE; } \
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x2 = XMIN; \
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WHEN_CLIPPED; \
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} \
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if(y1 < YMIN) { \
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FL_SCALE(temp,(x1 - x2),(YMIN - y1),(y2 - y1)); \
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x1 -= temp; \
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y1 = YMIN; \
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WHEN_CLIPPED; \
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} \
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if(y2 > YMAX) { \
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FL_SCALE(temp,(x1 - x2),(y2 - YMAX),(y2 - y1)); \
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x2 += temp; \
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y2 = YMAX; \
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WHEN_CLIPPED; \
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} \
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} \
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} while(false)
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#endif
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