def on_pre_render(self):
world_matrix = self.transform.get_matrix()
tris = []
if ((self.material != None) and (self.mesh)):
#distance culling
if (self.cull_by_distance):
direction_from_camera = self.transform.position - Application.scene.camera.transform.position
dist = direction_from_camera.magnitude()
if (dist >= Application.scene.camera.culling_distance):
return
#display each side with a different color (DEBUG)
if (self.debug_mode == True):
colors = [(1, 0, 0), (0, 1, 0), (0, 0, 1), (.5, .5, 0),
(.5, 0, .5), (0, .5, .5)]
i = 0
#Apply transform matrix transformation to triangles
for triangle in self.mesh.tris:
tpoly = []
for v in triangle.vertices:
transformed = vector3.multiply_matrix(v, world_matrix)
tpoly.append(transformed)
t = Triangle(tpoly[0], tpoly[1], tpoly[2])
center = t.get_center()
#calculate lights
if (self.debug_mode == False):
light_intensity = .05
for light in Application.lights_buffer:
light_intensity += light.calculate_intensity(
center, t.normal)
if (light_intensity > 1):
light_intensity = 1
t.color = self.material.color * light_intensity
else:
j = colors[math.floor(i / 2)]
t.color = color(j[0], j[1], j[2], 1)
i += 1
tris.append(t)
#add triangle to buffer
Application.add_triangle_to_buffer(tris)
