/* SImage::maskFromColour
* Changes the mask/alpha channel so that pixels that match [colour]
* are fully transparent, and all other pixels fully opaque
*******************************************************************/
bool SImage::maskFromColour(rgba_t colour, Palette8bit* pal)
{
if (type == PALMASK)
{
// Get palette to use
if (has_palette || !pal)
pal = &palette;
// Palette+Mask type, go through the mask
for (int a = 0; a < width * height; a++)
{
if (pal->colour(data[a]).equals(colour))
mask[a] = 0;
else
mask[a] = 255;
}
}
else if (type == RGBA)
{
// RGBA type, go through alpha channel
uint32_t c = 0;
for (int a = 0; a < width * height; a++)
{
rgba_t pix_col(data[c], data[c + 1], data[c + 2], 255);
if (pix_col.equals(colour))
data[c + 3] = 0;
else
data[c + 3] = 255;
// Skip to next pixel
c += 4;
}
}
else
return false;
// Announce change
announce("image_changed");
return true;
}
Color Scene::ray_to_raster(const Ray& r, unsigned int depth) {
float raymin;
ShadeHint hitsh;
int ox = 0;
int oy = 0;
SceneObject *curobj = getClosestObject(r, &raymin, &hitsh);
if (curobj == nullptr) {
return BG_COLOR;
} else {
Color pix_col(ambient_light);
// we've intesected an object
#ifdef SOFT_SHADOW
for (int i = 0; i < 4; i++) {
for (ox = 0; ox < 2; ox++) {
for (oy = 0; oy < 2; oy++) {
#endif
for (auto &light : lights) {
const Ray& shadowRay = r.createShadowRay(ox*0.2, oy*0.2, raymin, light);
if (hasNoObjectIntersections(curobj, shadowRay)) {
switch (curobj->type()) {
case SceneObject::TYPE::SPHERE:
case SceneObject::TYPE::TRIANGLE:
pix_col += curobj->calc_color(this, shadowRay, light, &hitsh, depth + 1);
break;
}
}
}
#ifdef SOFT_SHADOW
} } }
pix_col.r /= 15.0;
pix_col.g /= 15.0;
pix_col.b /= 15.0;
#endif
return pix_col;
}
}
