def maybe_update_matrices(self, gl):
update_transform = self.must_update_view or self.must_update_projection
if self.must_update_view:
self.update_view(gl)
self.must_update_view = False
if self.must_update_projection:
self.update_perspective(gl)
self.must_update_projection = False
if update_transform:
# Device coordinates are a square from (-1, -1) to (1, 1). Screen
# coordinates are (0, 0) to (width, height). Both coordinates
# are useful in different circumstances, so we'll pre-compute
# matrices to do the transformations from world coordinates
# into each of these.
transform_to_device = Matrix4x4.multiply_MM(self.projection_matrix, self.view_matrix)
translate = Matrix4x4.create_translation(1.0, 1.0, 0.0)
scale = Matrix4x4.create_scaling(self.render_state.screen_width * 0.5,
self.render_state.screen_height * 0.5, 1)
transform_to_screen = \
Matrix4x4.multiply_MM(Matrix4x4.multiply_MM(scale, translate), transform_to_device)
self.render_state.set_tranformation_matrices(transform_to_device, transform_to_screen)
def update_view(self, gl):
# Get a vector perpendicular to both, pointing to the right, by taking
# lookDir cross up.
look_dir = self.render_state.look_dir.copy()
up_dir = self.render_state.up_dir.copy()
right = cross_product(look_dir, up_dir)
if self.DEBUG_MODE != None:
from src.units.Vector3 import Vector3
look_dir = Vector3(Debug.LOOKDIRVECTORS[self.DEBUG_MODE][0],
Debug.LOOKDIRVECTORS[self.DEBUG_MODE][1],
Debug.LOOKDIRVECTORS[self.DEBUG_MODE][2])
up_dir = Vector3(Debug.UPDIRVECTORS[self.DEBUG_MODE][0],
Debug.UPDIRVECTORS[self.DEBUG_MODE][1],
Debug.UPDIRVECTORS[self.DEBUG_MODE][2])
right = Vector3(Debug.RIGHTVECTORS[self.DEBUG_MODE][0],
Debug.RIGHTVECTORS[self.DEBUG_MODE][1],
Debug.RIGHTVECTORS[self.DEBUG_MODE][2])
self.view_matrix = Matrix4x4.create_view(look_dir, up_dir, right)
gl.glMatrixMode(gl.GL_MODELVIEW)
adjust_matrix = Matrix4x4.Matrix4x4([0.0, 0.0, -1.0, 0.0,
0.0, 1.0, -0.0, 0.0,
1.0, 0.0, -0.0, 0.0,
0.0, 0.0, 0.0, 1.0])
matrix = Matrix4x4.multiply_MM(self.view_matrix, adjust_matrix)
# Invert the left/right rotation of the matrix
matrix.values[2] *= -1
matrix.values[8] *= -1
# Invert these so that we don't rotate in and out of the unit sphere
matrix.values[1] *= -1
matrix.values[4] *= -1
matrix = np.array(matrix.values, dtype=np.float32)
#matrix = np.array(self.view_matrix.values, dtype=np.float32)
gl.glLoadMatrixf(matrix)
def update_perspective(self, gl):
if self.DEBUG_MODE != None:
self.render_state.radius_of_view = Debug.RADIUSOFVIEW
self.projection_matrix = Matrix4x4.create_perspective_projection(
self.get_width(),
self.get_height(),
self.render_state.radius_of_view * 3.141593 / 360.0)
gl.glMatrixMode(gl.GL_PROJECTION)
matrix = np.array(self.projection_matrix.values, dtype=np.float32)
gl.glLoadMatrixf(matrix)
# The image is mirrored so scale it to make the polygon fronts into backs
gl.glScalef(-1.0, 1.0, 1.0)
# Switch back to the model view matrix.
gl.glMatrixMode(gl.GL_MODELVIEW)