Method SetFromCamera

experimental/collision/raycaster.go:134–146

SetRaycaster sets the specified raycaster with this camera position in world coordinates pointing to the direction defined by the specified coordinates unprojected using this camera.

(cam *camera.Camera, sx, sy float32)

// SetRaycaster sets the specified raycaster with this camera position in world coordinates
// pointing to the direction defined by the specified coordinates unprojected using this camera.
func (rc *Raycaster) SetFromCamera(cam *camera.Camera, sx, sy float32) error { // TODO maybe use ICamera

	var origin, direction math32.Vector3
	matrixWorld := cam.MatrixWorld()
	origin.SetFromMatrixPosition(&matrixWorld)
	direction.Set(sx, sy, 0.5)

	unproj := cam.Unproject(&direction) // unproj = direction after this point TODO improve clarity
	unproj.Sub(&origin).Normalize()
	rc.Set(&origin, &direction)
	cam.ViewMatrix(&rc.ViewMatrix) // Update the view matrix of the raycaster
	return nil
}

// RaycastSprite checks intersections between the raycaster and the specified sprite
// and if any found appends it to the specified intersects array.