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Add clipping to other modes

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This commit is contained in:
Miloslav Číž 2019-05-11 17:25:54 +02:00
parent 229c3f465a
commit 6c808f368a
1 changed files with 27 additions and 14 deletions
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13
s3l.h
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@ -1219,12 +1219,16 @@ void S3L_drawTriangle(S3L_Vec4 point0, S3L_Vec4 point1, S3L_Vec4 point2,
p.barycentric2 = 0;\ p.barycentric2 = 0;\
lineLen = S3L_nonZero(line.steps);\ lineLen = S3L_nonZero(line.steps);\
do\ do\
{\
if (line.x >= 0 && line.x < S3L_RESOLUTION_X &&\
line.y >= 0 && line.y < S3L_RESOLUTION_Y)\
{\ {\
p.x = line.x; p.y = line.y;\ p.x = line.x; p.y = line.y;\
p.barycentric##p1 = S3L_interpolateFrom0(\ p.barycentric##p1 = S3L_interpolateFrom0(\
S3L_FRACTIONS_PER_UNIT,line.steps,lineLen); \ S3L_FRACTIONS_PER_UNIT,line.steps,lineLen); \
p.barycentric##p2 = S3L_FRACTIONS_PER_UNIT - p.barycentric##p1;\ p.barycentric##p2 = S3L_FRACTIONS_PER_UNIT - p.barycentric##p1;\
S3L_PIXEL_FUNCTION(&p);\ S3L_PIXEL_FUNCTION(&p);\
}\
} while (S3L_bresenhamStep(&line)); } while (S3L_bresenhamStep(&line));
drawLine(0,1) drawLine(0,1)
@ -1234,20 +1238,29 @@ void S3L_drawTriangle(S3L_Vec4 point0, S3L_Vec4 point1, S3L_Vec4 point2,
#undef drawLine #undef drawLine
} }
else // point mode else // point mode
{
if (x0 >= 0 && x0 < S3L_RESOLUTION_X && y0 >= 0 && y0 < S3L_RESOLUTION_Y)
{ {
p.x = x0; p.y = y0; p.barycentric0 = S3L_FRACTIONS_PER_UNIT; p.x = x0; p.y = y0; p.barycentric0 = S3L_FRACTIONS_PER_UNIT;
p.barycentric1 = 0; p.barycentric2 = 0; p.barycentric1 = 0; p.barycentric2 = 0;
S3L_PIXEL_FUNCTION(&p); S3L_PIXEL_FUNCTION(&p);
}
if (x1 >= 0 && x1 < S3L_RESOLUTION_X && y1 >= 0 && y1 < S3L_RESOLUTION_Y)
{
p.x = x1; p.y = y1; p.barycentric0 = 0; p.x = x1; p.y = y1; p.barycentric0 = 0;
p.barycentric1 = S3L_FRACTIONS_PER_UNIT; p.barycentric2 = 0; p.barycentric1 = S3L_FRACTIONS_PER_UNIT; p.barycentric2 = 0;
S3L_PIXEL_FUNCTION(&p); S3L_PIXEL_FUNCTION(&p);
}
if (x2 >= 0 && x2 < S3L_RESOLUTION_X && y2 >= 0 && y2 < S3L_RESOLUTION_Y)
{
p.x = x2; p.y = y2; p.barycentric0 = 0; p.x = x2; p.y = y2; p.barycentric0 = 0;
p.barycentric1 = 0; p.barycentric2 = S3L_FRACTIONS_PER_UNIT; p.barycentric1 = 0; p.barycentric2 = S3L_FRACTIONS_PER_UNIT;
S3L_PIXEL_FUNCTION(&p); S3L_PIXEL_FUNCTION(&p);
} }
} }
}
static inline void S3L_rotate2DPoint(S3L_Unit *x, S3L_Unit *y, S3L_Unit angle) static inline void S3L_rotate2DPoint(S3L_Unit *x, S3L_Unit *y, S3L_Unit angle)
{ {