trigonColor function
Implementation
bool trigonColor(Pointer<SdlRenderer> renderer, double x1, double y1, double x2,
double y2, double x3, double y3, int color) {
var vx = calloc<Int16>(3);
var vy = calloc<Int16>(3);
vx[0] = x1.toInt();
vx[1] = x2.toInt();
vx[2] = x3.toInt();
vy[0] = y1.toInt();
vy[1] = y2.toInt();
vy[2] = y3.toInt();
var result = polygonColor(renderer, vx, vy, 3, color);
calloc.free(vx);
calloc.free(vy);
return result;
}