demosys/scene/camera.py
def _gl_look_at(self, pos, target, up):
        """
        The standard lookAt method

        :param pos: current position
        :param target: target position to look at
        :param up: direction up
        """
        z = vector.normalise(pos - target)
        x = vector.normalise(vector3.cross(vector.normalise(up), z))
        y = vector3.cross(z, x)

        translate = matrix44.create_identity()
        translate[3][0] = -pos.x
        translate[3][1] = -pos.y
        translate[3][2] = -pos.z

        rotate = matrix44.create_identity()
        rotate[0][0] = x[0]  # -- X
        rotate[1][0] = x[1]
        rotate[2][0] = x[2]
        rotate[0][1] = y[0]  # -- Y
        rotate[1][1] = y[1]
        rotate[2][1] = y[2]
        rotate[0][2] = z[0]  # -- Z
        rotate[1][2] = z[1]
        rotate[2][2] = z[2]

        return matrix44.multiply(translate, rotate)
def _gl_look_at(self, pos, target, up):
        """
        The standard lookAt method

        :param pos: current position
        :param target: target position to look at
        :param up: direction up
        """
        z = vector.normalise(pos - target)
        x = vector.normalise(vector3.cross(vector.normalise(up), z))
        y = vector3.cross(z, x)

        translate = matrix44.create_identity()
        translate[3][0] = -pos.x
        translate[3][1] = -pos.y
        translate[3][2] = -pos.z

        rotate = matrix44.create_identity()
        rotate[0][0] = x[0]  # -- X
        rotate[1][0] = x[1]
        rotate[2][0] = x[2]
        rotate[0][1] = y[0]  # -- Y
        rotate[1][1] = y[1]
        rotate[2][1] = y[2]
        rotate[0][2] = z[0]  # -- Z
        rotate[1][2] = z[1]
        rotate[2][2] = z[2]

        return matrix44.multiply(translate, rotate)
def _gl_look_at ( self , pos , target , up ) : z = vector . normalise ( pos - target ) x = vector . normalise ( vector3 . cross ( vector . normalise ( up ) , z ) ) y = vector3 . cross ( z , x ) translate = matrix44 . create_identity ( ) translate [ 3 ] [ 0 ] = - pos . x translate [ 3 ] [ 1 ] = - pos . y translate [ 3 ] [ 2 ] = - pos . z rotate = matrix44 . create_identity ( ) rotate [ 0 ] [ 0 ] = x [ 0 ] # -- X rotate [ 1 ] [ 0 ] = x [ 1 ] rotate [ 2 ] [ 0 ] = x [ 2 ] rotate [ 0 ] [ 1 ] = y [ 0 ] # -- Y rotate [ 1 ] [ 1 ] = y [ 1 ] rotate [ 2 ] [ 1 ] = y [ 2 ] rotate [ 0 ] [ 2 ] = z [ 0 ] # -- Z rotate [ 1 ] [ 2 ] = z [ 1 ] rotate [ 2 ] [ 2 ] = z [ 2 ] return matrix44 . multiply ( translate , rotate )
The standard lookAt method

        :param pos: current position
        :param target: target position to look at
        :param up: direction up
The standard lookAt method