Release 1.1 with higher resolution textures.

After all, it doesn't exactly make sense for saturn's moons and mercury to have more detailed textures than larger objects like the sun or venus.

Also used one single texture to do the transparency mask for the glow, instead of having separate textures for each glowy object.

punyverse/assets/textures.txt

@@ -1,7 +1,9 @@
 # This file contains all the textures that is bigger than the minimum OpenGL texture size
 # and hence may need to be resized depending on the machine
 
+sun.jpg
 mercury.jpg
+venus.jpg
 earth.jpg
 earth_normal.jpg
 earth_emission.jpg
@@ -11,6 +13,8 @@ moon.jpg
 mars.jpg
 jupiter.jpg
 saturn.jpg
+uranus.jpg
+neptune.jpg
 sky_px.jpg
 sky_py.jpg
 sky_pz.jpg

punyverse/entity.py

@@ -388,8 +388,9 @@ class SphericalBody(Body):
 
         if 'atmosphere' in info:
             atmosphere_data = info['atmosphere']
-            atm_size = world.evaluate(atmosphere_data.get('diffuse_size', None))
+            atm_size = world.evaluate(atmosphere_data.get('glow_size', None))
-            atm_texture = atmosphere_data.get('diffuse_texture', None)
+            atm_texture = atmosphere_data.get('glow_texture', None)
+            atm_color = atmosphere_data.get('glow_color', None)
             cloud_texture = atmosphere_data.get('cloud_texture', None)
             if cloud_texture is not None:
                 self.cloud_transparency = get_best_texture(cloud_texture, loader=load_alpha_mask)
@@ -405,8 +406,9 @@ class SphericalBody(Body):
                                             self.clouds.stride, self.clouds.uv_offset)
                     glBindBuffer(GL_ARRAY_BUFFER, 0)
 
-            if atm_texture is not None:
+            if atm_texture is not None and atm_color is not None:
                 self.atm_texture = load_texture_1d(atm_texture, clamp=True)
+                self.atm_color = atm_color
                 self.atmosphere = Disk(self.radius, self.radius + atm_size, 30)
                 self.atmosphere_vao = VAO()
                 shader = self.world.activate_shader('atmosphere')
@@ -513,7 +515,8 @@ class SphericalBody(Body):
         shader.uniform_mat4('u_mvpMatrix', self.world.projection_matrix() * matrix)
 
         glBindTexture(GL_TEXTURE_1D, self.atm_texture)
-        shader.uniform_texture('u_texture', 0)
+        shader.uniform_texture('u_transparency', 0)
+        shader.uniform_vec3('u_color', *self.atm_color)
 
         with self.atmosphere_vao:
             glDrawArrays(GL_TRIANGLE_STRIP, 0, self.atmosphere.vertex_count)

punyverse/shaders/atmosphere.fragment.glsl

@@ -3,8 +3,10 @@
 in float v_u;
 
 out vec4 o_fragColor;
-uniform sampler1D u_texture;
+
+uniform vec3 u_color;
+uniform sampler1D u_transparency;
 
 void main() {
-    o_fragColor = texture(u_texture, v_u);
+    o_fragColor = vec4(u_color, texture(u_transparency, v_u).r);
 }

punyverse/world.json

@@ -7,7 +7,7 @@
     "distance": "virtual distance to look better, in km",
     "sma": "semi-major axis used with mass of parent to calculate orbit, in km",
     "mass": "mass in kg",
-    "texture": "a group of texture to use, tried in that order. a list means a colour",
+    "texture": "a group of texture to use, tried in that order",
     "model": "used to load a wavefront object instead of a textured sphere"
   },
   "au": 10000,
@@ -24,8 +24,9 @@
       "light_source": true,
       "type": "star",
       "atmosphere": {
-        "diffuse_texture": "sun_diffuse.png",
+        "glow_color": [0.92, 0.92, 0.82],
-        "diffuse_size": 300
+        "glow_texture": "glow.png",
+        "glow_size": 300
       }
     },
     "mercury": {
@@ -61,8 +62,9 @@
       "emission_map": ["earth_emission.jpg", "earth_emission_medium.jpg", "earth_emission_small.jpg"],
       "atmosphere": {
         "cloud_texture": ["cloudmap.jpg", "cloudmap_small.jpg"],
-        "diffuse_texture": "atmosphere_earth.png",
+        "glow_color": [0.11, 0.32, 0.43],
-        "diffuse_size": 30
+        "glow_texture": "glow.png",
+        "glow_size": 30
       },
       "orbit_distance": "AU",
       "satellites": {

setup.py

@@ -105,7 +105,7 @@ else:
 
 setup(
     name='punyverse',
-    version='1.0',
+    version='1.1',
     packages=['punyverse'],
     package_data={
         'punyverse': [