Method Unproject

camera/camera.go:291–307

Unproject transforms the specified position from camera projected coordinates to world coordinates.

(v *math32.Vector3)

// Unproject transforms the specified position from camera projected coordinates to world coordinates.
func (c *Camera) Unproject(v *math32.Vector3) *math32.Vector3 {

	// Get inverted camera view matrix
	invViewMat := c.MatrixWorld()

	// Get inverted camera projection matrix
	var invProjMat math32.Matrix4
	c.ProjMatrix(&invProjMat)
	err := invProjMat.GetInverse(&invProjMat)
	if err != nil {
		panic("Camera.Unproject: Couldn't invert matrix")
	}

	// Apply invViewMat * invProjMat to the provided vector
	v.ApplyProjection(invViewMat.Multiply(&invProjMat))
	return v
}