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Remove unused parameter

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This commit is contained in:
Miloslav Číž 2019-05-05 20:13:07 +02:00
parent 9c60d2584b
commit 193f29c6ef
2 changed files with 13 additions and 16 deletions
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23
s3l.h
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@ -734,9 +734,8 @@ void S3L_drawTriangle(
specifics of this algorithm are among others:
- drawing possibly a NON-CONTINUOUS line
- NOT tracing the line exactly, but rather rasterizing either on the
left or right side of it (depending on what's chosen), according to
the pixel CENTERS
- NOT tracing the line exactly, but rather rasterizing on one (right)
side of it, according to the pixel CENTERS
The principle is this:
@ -747,9 +746,7 @@ void S3L_drawTriangle(
- To make this INTEGER ONLY, scale the case so that distance between
pixels is equal to dy (instead of 1). This way the error becomes
dx/dy * dy == dx, and we're comparing the error to (and potentially
substracting) 1 * dy == dy.
- The inital error is set to either 0 or dy (effectively shifting the
line) dependin on whether we want to rasterize on right or left. */
substracting) 1 * dy == dy. */
int16_t
/* triangle side:
@ -771,9 +768,9 @@ void S3L_drawTriangle(
p1 - point from (t, l or r)
p2 - point to (t, l or r)
down - whether the side coordinate goes top-down or vice versa
left - whether to rasterize on left of the line or vice versa */
*/
#define initSide(s,p1,p2,down,left)\
#define initSide(s,p1,p2,down)\
s##X = p1##PointX;\
s##Dx = p2##PointX - p1##PointX;\
s##Dy = p2##PointY - p1##PointY;\
@ -785,7 +782,7 @@ void S3L_drawTriangle(
s##SideUnitStep *= -1;\
}\
s##Inc = s##Dx >= 0 ? 1 : -1;\
s##Err = left != (s##Dx < 0) ? 0 : s##Dy;\
s##Err = (s##Dx < 0) ? 0 : s##Dy;\
s##ErrAdd = S3L_abs(s##Dx);\
s##ErrSub = s##Dy != 0 ? s##Dy : 1; /* don't allow 0, could lead to an
infinite substracting loop */
@ -798,8 +795,8 @@ void S3L_drawTriangle(
}\
s##Err += s##ErrAdd;
initSide(r,t,r,1,0)
initSide(l,t,l,1,0)
initSide(r,t,r,1)
initSide(l,t,l,1)
while (currentY < endY) /* draw the triangle from top to bottom -- the
bottom-most row is left out because, following
@ -810,7 +807,7 @@ void S3L_drawTriangle(
{ // then reinit one side
if (splitOnLeft)
{
initSide(l,l,r,0,0);
initSide(l,l,r,0);
S3L_Unit *tmp = barycentric0;
barycentric0 = barycentric2;
@ -821,7 +818,7 @@ void S3L_drawTriangle(
}
else
{
initSide(r,r,l,0,0);
initSide(r,r,l,0);
S3L_Unit *tmp = barycentric1;
barycentric1 = barycentric2;

6
test.c
View file

@ -80,7 +80,7 @@ uint16_t testRasterization()
numErrors += testTriangleRasterization(5,3, 3,3, 9,3, pixelsEmpty);
numErrors += testTriangleRasterization(9,4, 9,0, 9,9, pixelsEmpty);
numErrors += testTriangleRasterization(3,3, 6,6, 7,7, pixelsEmpty);
numErrors += testTriangleRasterization(3,3, 6,6, 9,9, pixelsEmpty);
numErrors += testTriangleRasterization(7,0, 3,3, 0,7, pixelsEmpty);
numErrors += testTriangleRasterization(7,7, 7,7, 7,7, pixelsEmpty);
@ -297,8 +297,8 @@ uint16_t testRasterization()
uint16_t numErrors2 = 0;
for (uint8_t y = 0; y < TEST_BUFFER_H - 1; ++y)
{
printf(" ");
{ // ^ complete left and bottom aren't
printf(" "); // supposed to be rasterized
for (uint8_t x = 0; x < TEST_BUFFER_W - 1; ++x)
{