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Advance barycentric

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This commit is contained in:
Miloslav Číž 2018-11-18 09:33:15 +01:00
parent d3a3e12f33
commit 85f48c1d79
2 changed files with 10 additions and 6 deletions
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7
s3l.h
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@ -273,7 +273,6 @@ void S3L_drawTriangle(int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2
initSide(l,l,r,0); initSide(l,l,r,0);
barycentric1 = &p.barycentricC; barycentric1 = &p.barycentricC;
barycentric2 = &p.barycentricB;
barycentric3 = &p.barycentricA; barycentric3 = &p.barycentricA;
rSideUnitPos = S3L_FRACTIONS_PER_UNIT - rSideUnitPos; rSideUnitPos = S3L_FRACTIONS_PER_UNIT - rSideUnitPos;
@ -283,7 +282,11 @@ void S3L_drawTriangle(int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2
{ {
initSide(r,r,l,0); initSide(r,r,l,0);
// TODO barycentric2 = &p.barycentricC;
barycentric3 = &p.barycentricB;
lSideUnitPos = S3L_FRACTIONS_PER_UNIT - lSideUnitPos;
lSideUnitStep *= -1;
} }
} }

9
testSDL.c
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@ -48,16 +48,17 @@ const int16_t test_coords[] =
100,100, 99,101, 101,101, // 0, small triangle 100,100, 99,101, 101,101, // 0, small triangle
190,50, 200,10, 400,80, // 1, arbitrary 190,50, 200,10, 400,80, // 1, arbitrary
40,80, 20,50, 100,30, // 2, arbitrary 40,80, 20,50, 100,30, // 2, arbitrary
150,300, 290,400, 450,400, // 3, regular 350,270, 440,200, 490,220, // 3, arbitrary
105,300, 120,300, 201,300, // 4, horizontal line 150,300, 290,400, 450,400, // 4, regular
400,300, 400,320, 400,400 // 5, vertical line 105,200, 120,200, 201,200, // 5, horizontal line
300,200, 300,250, 300,220 // 6, vertical line
}; };
void draw() void draw()
{ {
clearScreen(); clearScreen();
for (int c = 0; c < 4; ++c) for (int c = 0; c < 7; ++c)
{ {
int int
x0 = test_coords[6 * c], x0 = test_coords[6 * c],