public bool PrimitivesTouches(TexturedPrimitive otherPrim) /// nao é preciso
{
Vector2 v = mPosition - otherPrim.mPosition;
float dist = v.Length();
return(dist < ((mSize.X / 2f) + (otherPrim.mSize.X / 2f)));
}
public bool PixelTouches(TexturedPrimitive otherPrim, out Vector2 collidePoint)
{
bool touches = PrimitivesTouches(otherPrim);
collidePoint = mPosition;
if (touches)
{
bool pixelTouch = false;
Vector2 myXDir = ShowVector.RotateVectorByAngle(Vector2.UnitX, RotateAngleInRadian);
Vector2 myYDir = ShowVector.RotateVectorByAngle(Vector2.UnitY, RotateAngleInRadian);
Vector2 otherXDir = ShowVector.RotateVectorByAngle(Vector2.UnitX, otherPrim.RotateAngleInRadian);
Vector2 otherYDir = ShowVector.RotateVectorByAngle(Vector2.UnitY, otherPrim.RotateAngleInRadian);
int i = 0;
while ((!pixelTouch) && (i < SpriteImageWidth))
{
int j = 0;
while ((!pixelTouch) && (j < SpriteImageHeight))
{
collidePoint = IndexToCameraPosition(i, j, myXDir, myYDir);
Color myColor = GetColor(i, j);
if (myColor.A > 0)
{
Vector2 otherIndex = otherPrim.CameraPositionToIndex(collidePoint, otherXDir, otherYDir);
int xMin = (int)otherIndex.X;
int yMin = (int)otherIndex.Y;
if ((xMin >= 0) && (xMin < otherPrim.SpriteImageWidth) &&
(yMin >= 0) && (yMin < otherPrim.SpriteImageHeight))
{
pixelTouch = (otherPrim.GetColor(xMin, yMin).A > 0);
}
}
j++;
}
i++;
}
touches = pixelTouch;
}
return(touches);
}
static public CameraWindowCollisionStatus CollidedWithCameraWindow(TexturedPrimitive prim)
{
Vector2 min = CameraWindowLowerLeftPosition;
Vector2 max = CameraWindowUpperRightPosition;
if (prim.MaxBound.Y > max.Y)
{
return(CameraWindowCollisionStatus.CollideTop);
}
if (prim.MinBound.X < min.X)
{
return(CameraWindowCollisionStatus.CollideLeft);
}
if (prim.MaxBound.X > max.X)
{
return(CameraWindowCollisionStatus.CollideRight);
}
if (prim.MinBound.Y < min.Y)
{
return(CameraWindowCollisionStatus.CollideBottom);
}
return(CameraWindowCollisionStatus.InsideWindow);
}
