Cleanup sea triangles creation.

game/game.py

@@ -157,7 +157,7 @@ def main():
 
     sea_polar_textures = sea.load_polar_textures(('data/sea_bump1.png', 'data/sea_bump2.png'))
     sea_detail_texture = sea.load_detail_texture('data/sea_bump.png')
-    sea_triangles = sea.SeaTriangles(64, proj_far_z - 0.1, proj_ratio)
+    sea_triangles = sea.sea_triangles(64, proj_far_z - 0.1, proj_ratio)
 
     scene = SceneNode(
         FuncNode(update_camera, (mouse, camera, environment)),

game/sea.py

@@ -71,35 +71,34 @@ def load_detail_texture(path, scale = 0.5, waves_height = 0.002):
     data = array(_typecode, list(map(_conv, normals)))
     return Texture(_format, width, height, 0, _flags, data)
 
-class SeaTriangles(Triangles):
+# TODO: with FOV
-    # TODO: with FOV
+def sea_triangles(vsubdivs, distance, projection_ratio):
-    def __init__(self, vsubdivs, distance, projection_ratio):
+    assert vsubdivs > 0
-        assert vsubdivs > 0
+    vertices = []
-        vertices = []
+    hsubdivs = round(vsubdivs * projection_ratio)
-        hsubdivs = round(vsubdivs * projection_ratio)
+    z = -distance
-        z = -distance
+    width = distance * projection_ratio
-        width = distance * projection_ratio
+    height = distance
-        height = distance
+    startx = width * -0.5
-        startx = width * -0.5
+    starty = height * -0.5
-        starty = height * -0.5
+    stepx = width / hsubdivs
-        stepx = width / hsubdivs
+    stepy = height / vsubdivs
-        stepy = height / vsubdivs
+    y1 = starty
-        y1 = starty
+    y2 = y1 + stepy
-        y2 = y1 + stepy
+    for sy in range(vsubdivs):
-        for sy in range(vsubdivs):
+        x1 = startx
-            x1 = startx
+        x2 = x1 + stepx
-            x2 = x1 + stepx
+        for sx in range(hsubdivs):
-            for sx in range(hsubdivs):
+            a = (x1, y2, z)
-                a = (x1, y2, z)
+            b = (x2, y1, z)
-                b = (x2, y1, z)
+            vertices.append((x1, y1, z))
-                vertices.append((x1, y1, z))
+            vertices.append(b)
-                vertices.append(b)
+            vertices.append(a)
-                vertices.append(a)
+            vertices.append((x2, y2, z))
-                vertices.append((x2, y2, z))
+            vertices.append(a)
-                vertices.append(a)
+            vertices.append(b)
-                vertices.append(b)
+            x1 = x2
-                x1 = x2
+            x2 += stepx
-                x2 += stepx
+        y1 = y2
-            y1 = y2
+        y2 += stepy
-            y2 += stepy
+    return Triangles(array('f', chain.from_iterable(vertices)))
-        super().__init__(array('f', chain.from_iterable(vertices)))