Rework environment.

game/environment.py

@@ -14,9 +14,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from math import radians, cos
-
+from engine import vec3, vec3_up, mat4_mul_vec3, resolve_input, set_input_vec3
-from engine import *
-
 from game.math import vec3_add, vec3_sub, vec3_scale, vec3_mul, vec3_dot
 
 def _angles(start, end):
@@ -30,6 +28,10 @@ def _floats(a, b):
 def _colors(a, b):
     return (a, vec3_sub(b, a))
 
+_light_power = (
+    (_angles(180.0, 0.0), _floats(1.0, 1.0)),
+)
+
 _light_color = (
     (_angles(180.0, 0.0), _colors((1.0, 1.0, 1.0), (1.0, 1.0, 1.0))),
 )
@@ -46,11 +48,6 @@ _sun_color = (
     (_angles(180.0, 0.0), _colors((8.0, 8.0, 4.0), (8.0, 8.0, 4.0))),
 )
 
-_light_power = (
-    (_angles(180.0, 90.0), _floats(0.0, 0.0)),
-    (_angles( 90.0,  0.0), _floats(0.0, 1.0))
-)
-
 def _resolve(ranges, c):
     for (cmin, cmax, crng), ab in ranges:
         if c >= cmin and c <= cmax:
@@ -65,24 +62,41 @@ def _resolve_color(ranges, c):
     w, (a, b) = _resolve(ranges, c)
     return vec3_add(a, vec3_scale(b, w))
 
-def resolve_inputs(shader):
+class _Inputs:
-    light_direction = resolve_input(shader, b'u_light_direction')
+    __slots__ = 'light_direction', 'light_color', 'horizon_color', 'sky_color', 'sun_color'
-    light_color = resolve_input(shader, b'u_light_color')
-    horizon_color = resolve_input(shader, b'u_horizon_color')
-    sky_color = resolve_input(shader, b'u_sky_color')
-    sun_color = resolve_input(shader, b'u_sun_color')
-    return (light_direction, light_color, horizon_color, sky_color, sun_color)
 
-def from_sun(view, sun_direction, sun_power):
+    def __init__(self, shader):
+        self.light_direction = resolve_input(shader, b'u_light_direction')
+        self.light_color = resolve_input(shader, b'u_light_color')
+        self.horizon_color = resolve_input(shader, b'u_horizon_color')
+        self.sky_color = resolve_input(shader, b'u_sky_color')
+        self.sun_color = resolve_input(shader, b'u_sun_color')
+
+class Environment:
+    __slots__ = 'light_direction', 'light_color', 'horizon_color', 'sky_color', 'sun_color'
+
+    def __init__(self):
+        self.light_direction = vec3()
+        self.light_color = vec3()
+        self.horizon_color = vec3()
+        self.sky_color = vec3()
+        self.sun_color = vec3()
+
+    def from_sun(self, view, sun_direction, sun_power):
         c = vec3_dot(sun_direction, vec3_up)
         light_power = _resolve_float(_light_power, c) * sun_power
-    light_color = vec3_scale(_resolve_color(_light_color, c), sun_power) # vec3_scale(_resolve_color(_light_color, c), light_power)
+        mat4_mul_vec3(self.light_direction, view, sun_direction, 0.0)
-    horizon_color = vec3_mul(_resolve_color(_horizon_color, c), light_color)
+        self.light_color = vec3(vec3_scale(_resolve_color(_light_color, c), light_power))
-    sky_color = vec3_mul(_resolve_color(_sky_color, c), light_color)
+        self.horizon_color = vec3(vec3_scale(_resolve_color(_horizon_color, c), light_power))
-    sun_color = _resolve_color(_sun_color, c)
+        self.sky_color = vec3(vec3_scale(_resolve_color(_sky_color, c), light_power))
-    light_direction = vec3()
+        self.sun_color = vec3(_resolve_color(_sun_color, c))
-    mat4_mul_vec3(light_direction, view, sun_direction, 0.0)
-    return (light_direction, vec3(light_color), vec3(horizon_color), vec3(sky_color), vec3(sun_color))
 
-def update_inputs(inputs, values):
+    def resolve_inputs(self, shader):
-    list(map(set_input_vec3, inputs, values))
+        return _Inputs(shader)
+
+    def update_inputs(self, inputs):
+        set_input_vec3(inputs.light_direction, self.light_direction)
+        set_input_vec3(inputs.light_color, self.light_color)
+        set_input_vec3(inputs.horizon_color, self.horizon_color)
+        set_input_vec3(inputs.sky_color, self.sky_color)
+        set_input_vec3(inputs.sun_color, self.sun_color)

game/game.py

@@ -24,19 +24,19 @@ from game import shader
 from game import resources
 from game import batch
 from game import triangles
-from game import environment
-from game.camera import Camera
 from game import sea
+from game.camera import Camera
+from game.environment import Environment
 
 proj_hfov = pi * 0.25
 proj_ratio = 16.0 / 9.0
 proj_near_z = 8.0
 proj_far_z = 3000.0
 
-sun_direction = vec3(math.vec3_normalize((1.0, 0.0, 1.0)))
+sun_direction = math.vec3_normalize((1.0, 0.0, 1.0))
 sun_power = 1.0
-camera_origin = vec3((0.0, -1200.0,  500.0))
+camera_origin = (0.0, -1200.0,  500.0)
-camera_lookat = vec3((0.0,   500.0, -500.0))
+camera_lookat = (0.0,   500.0, -500.0)
 
 def main():
     print("Generating terrain...")
@@ -138,6 +138,7 @@ def main():
     tests_camera_inputs = camera.resolve_inputs(tests_shader)
     sky_camera_inputs = camera.resolve_inputs(sky_shader)
 
+    environment = Environment()
     terrain_environment_inputs = environment.resolve_inputs(terrain_shader)
     tests_environment_inputs = environment.resolve_inputs(tests_shader)
     sky_environment_inputs = environment.resolve_inputs(sky_shader)
@@ -182,15 +183,14 @@ def main():
             tests_batch.set_param(1, clouds_id, _clouds_orientation)
 
             mat3_rotation(_rotation, up, (current_time * 0.05) % tau)
-            mat3_mul_vec3(_origin, _rotation, camera_origin)
+            mat3_mul_vec3(_origin, _rotation, vec3(camera_origin))
-            mat3_mul_vec3(_lookat, _rotation, camera_lookat)
+            mat3_mul_vec3(_lookat, _rotation, vec3(camera_lookat))
-
             camera.set_view(_origin, _lookat)
-            environment_values = environment.from_sun(camera.view, sun_direction, sun_power)
+            environment.from_sun(camera.view, vec3(sun_direction), sun_power)
 
             select_shader(terrain_shader)
             camera.update_inputs(terrain_camera_inputs)
-            environment.update_inputs(terrain_environment_inputs, environment_values)
+            environment.update_inputs(terrain_environment_inputs)
             select_texture(tiles_texture, tiles_sampler)
             select_texture(heightmap, terrain_heightmap_sampler)
             select_texture(normalmap, terrain_normalmap_sampler)
@@ -206,7 +206,7 @@ def main():
 
             select_shader(tests_shader)
             camera.update_inputs(tests_camera_inputs)
-            environment.update_inputs(tests_environment_inputs, environment_values)
+            environment.update_inputs(tests_environment_inputs)
             select_texture(tests_texture, tests_sampler)
             select_texture(heightmap, tests_heightmap_sampler)
             select_texture(normalmap, tests_normalmap_sampler)
@@ -222,7 +222,7 @@ def main():
 
             select_shader(sky_shader)
             camera.update_inputs(sky_camera_inputs)
-            environment.update_inputs(sky_environment_inputs, environment_values)
+            environment.update_inputs(sky_environment_inputs)
             set_input_float(sea_phase, (current_time * 0.023) % 1.0)
             select_texture(sea_polar_textures, sea_polar_sampler)
             select_texture(sea_detail_texture, sea_detail_sampler)