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Texture the cube correctly

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This commit is contained in:
Miloslav Číž 2019-05-07 21:14:42 +02:00
parent 8d7316baad
commit fb9f7c6b10
2 changed files with 22 additions and 20 deletions
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4
s3l.h
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@ -1011,7 +1011,9 @@ static inline void S3L_mapCameraToScreen(S3L_Vec4 point, S3L_Camera *camera,
/*
Helper function to interpolate texture coordinates based on barycentric
coordinates.
coordinates. If you're going for max performance, you may want to compute
these values yourself -- some specific cases may be possible to compute
faster.
*/
void S3L_interpolateTexCoords(

38
testSDL.c
View file

@ -42,18 +42,18 @@ S3L_Unit ver[] =
S3L_Unit tex_coords[] =
{
16,0, 0,0, 16,16,
16,0, 0,0, 16,16,
16,0, 0,0, 16,16,
16,0, 0,0, 16,16,
16,0, 0,0, 16,16,
16,0, 0,0, 16,16,
16,0, 0,0, 16,16,
16,0, 0,0, 16,16,
16,0, 0,0, 16,16,
16,0, 0,0, 16,16,
16,0, 0,0, 16,16,
16,0, 0,0, 16,16
1,1, 0,0, 1,0,
1,1, 0,1, 0,0,
1,0, 1,1, 0,1,
1,0, 0,1, 0,0,
0,0, 1,0, 1,1,
1,1, 0,1, 0,0,
0,1, 0,0, 1,0,
0,1, 1,0, 1,1,
1,1, 0,0, 1,0,
1,1, 0,1, 0,0,
0,1, 1,0, 1,1,
0,1, 0,0, 1,0
};
#undef S
@ -140,9 +140,9 @@ void drawPixel(S3L_PixelInfo *p)
coords = tex_coords + p->triangleID * 6;
S3L_interpolateTexCoords(
coords[0],coords[1],
coords[2],coords[3],
coords[4],coords[5],
coords[0] * 16,coords[1] * 16,
coords[2] * 16,coords[3] * 16,
coords[4] * 16,coords[5] * 16,
p,
&u,&v);
@ -161,8 +161,8 @@ void draw()
{
clearScreen();
// modelTransform.rotation.z = frame * 0.2;
// modelTransform.rotation.x = frame * 0.1;
modelTransform.rotation.z = frame * 0.1;
modelTransform.rotation.x = frame * 0.3;
S3L_drawModelIndexed(ver,tri,12,modelTransform,camera,conf);
@ -219,8 +219,8 @@ int main()
camera.resolutionX = SCREEN_WIDTH;
camera.resolutionY = SCREEN_HEIGHT;
camera.transform.translation.z = -S3L_FRACTIONS_PER_UNIT * 2;
camera.transform.translation.x = S3L_FRACTIONS_PER_UNIT;
camera.transform.translation.y = S3L_FRACTIONS_PER_UNIT;
// camera.transform.translation.x = S3L_FRACTIONS_PER_UNIT;
// camera.transform.translation.y = S3L_FRACTIONS_PER_UNIT;
S3L_initTransoform3D(&modelTransform);
S3L_initDrawConfig(&conf);