/*******************************************
isCollide 检查 obj 是否碰撞到 hitter
一般认为hitter比较小
*******************************************/
bool Entity::collide(Entity &hitter)
{
for (int i = hitter.scr_x; i < hitter.scr_x + hitter.width; i++) {
for (int j = hitter.scr_y; j < hitter.scr_y + hitter.height; j++) {
if (hitter.getChar(i, j) == JMP_CHAR) continue;
if (isInImage(i, j)) return true;
}
}
return false;
}
//gets a pixel bounded by the image border
pixel_RGB getBoundPixel(ARVP_Image* img,int coordY,int coordX)
{
//printf("GETTING BOUND PIXEL (%i,%i)\n",coordY,coordX);
if(!isInImage(img,coordY,coordX))
{
if(coordX<0)
coordX=0;
else if(coordX>=int(img->width))
coordX=img->width-1;
if(coordY<0)
coordY=0;
else if(coordY>=int(img->height))
coordY=img->height-1;
}
return img->get((unsigned int)(coordY),(unsigned int)(coordX));
}
//get a pixel but don't go out of bounds
unsigned char getBoundChannel(ARVP_Image* img,unsigned int ch,int targY,int targX)
{
int coordY=targY;
int coordX=targX;
if(!isInImage(img,coordY,coordX))
{
if(coordX<0)
coordX=0;
else if(coordX>=int(img->width))
coordX=img->width-1;
if(coordY<0)
coordY=0;
else if(coordY>=int(img->height))
coordY=img->height-1;
}
//printf("GETTING BOUND CHANNEL (%i,%i,%i)\n",(int)ch,coordY,coordX);
return img->get_ch(ch,(coordY),(coordX));
}
