void SurfaceObject::scroll(int x, int y, int wrap)
{
SurfaceImage * image = selected_image;
image->wrap = wrap != 0;
if (use_image_blit) {
vector<SurfaceBlit>::iterator it;
for (it = blit_images.begin(); it != blit_images.end(); it++) {
SurfaceBlit & img = *it;
img.scroll_x += x;
img.scroll_y += y;
wrap_pos(img.scroll_x, img.x, img.image->width, image->width);
wrap_pos(img.scroll_y, img.y, img.image->height, image->height);
}
return;
} else if (image == NULL || image->handle == NULL)
return;
image->scroll_x = (image->scroll_x + x) % image->handle->width;
image->scroll_y = (image->scroll_y + y) % image->handle->height;
}
void read_positions(FILE *fp,
struct gadget_header_t *header,
float *buf,
struct gadget_particle_t *particles)
{
uint32_t dummy;
fread(&dummy, sizeof(dummy), 1, fp);
uint32_t len = header->npart[1];
fread(buf, sizeof(*buf), 3 * len, fp);
for (uint32_t i = 0; i < len; i++) {
memcpy(particles[i].pos, buf + i * 3, sizeof(*buf) * 3);
wrap_pos(particles[i].pos, header);
}
fread(&dummy, sizeof(dummy), 1, fp);
return;
}
