Double4 getColor2(double dx, double dy) {
double distance = (fabs(dx) + fabs(dy)) / 2.0;
if (distance < 0) distance = 0;
if (distance > 2.0) distance = 2.0;
if (distance <= 1.0) {
return lerp4(cl1, cl2, distance);
} else {
return lerp4(cl2, cl3, distance);
}
}
Double4 getColor(double dx, double dy) {
double distance = (fabs(dx) + fabs(dy)) / 4.0;
if (distance < 0) distance = 0;
if (distance > 1.0) distance = 1.0;
return lerp4(c1, c2, distance);
}
static void get_rot(vec4 *res, const uint8_t *p, const uint8_t *qt, int anim_id, double frame)
{
uint8_t start, end;
const keyframe4_t *k, *j;
float t;
start = (!anim_id) ? 0 : qt[anim_id - 1];
end = qt[anim_id];
k = (const keyframe4_t*)p; k += start;
if(start == end) {
*res = vec4(0.0, 0.0, 0.0, 1.0);
return;
}
if(start + 1 == end || frame <= k->frame) {
*res = k->vec;
return;
}
while((++k)->frame < frame);
j = k - 1;
t = (float)(frame - j->frame) / (float)(k->frame - j->frame);
*res = lerp4(j->vec, k->vec, t);
}
