refactor shaders

res/shaders/main.glslv

@@ -5,61 +5,51 @@ layout (location = 1) in vec2 v_texCoord;
 layout (location = 2) in vec4 v_light;
 layout (location = 3) in vec4 v_normal;
 
-out vec4 a_color;
-out vec2 a_texCoord;
-out vec3 a_normal;
 out float a_distance;
 out float a_fog;
-out vec3 a_position;
-out vec4 a_modelpos;
+out vec2 a_texCoord;
 out vec3 a_dir;
+out vec3 a_normal;
+out vec3 a_position;
 out vec3 a_realnormal;
+out vec4 a_color;
+out vec4 a_modelpos;
 
 uniform mat4 u_model;
 uniform mat4 u_proj;
 uniform mat4 u_view;
 uniform vec3 u_cameraPos;
 uniform float u_gamma;
-uniform float u_fogFactor;
-uniform float u_fogCurve;
-uniform float u_weatherFogOpacity;
-uniform float u_weatherFogDencity;
-uniform float u_weatherFogCurve;
 uniform float u_timer;
-uniform samplerCube u_cubemap;
+uniform samplerCube u_skybox;
 
 uniform vec3 u_torchlightColor;
 uniform float u_torchlightDistance;
-uniform bool u_enableShadows;
+
+#include <lighting>
 
 void main() {
-    vec4 modelpos = u_model * vec4(v_position, 1.0f);
-    vec3 pos3d = modelpos.xyz-u_cameraPos;
-    modelpos.xyz = apply_planet_curvature(modelpos.xyz, pos3d);
+    a_modelpos = u_model * vec4(v_position, 1.0f);
+    vec3 pos3d = a_modelpos.xyz - u_cameraPos;
+    a_modelpos.xyz = apply_planet_curvature(a_modelpos.xyz, pos3d);
 
     a_realnormal = v_normal.xyz * 2.0 - 1.0;
-    mat3 normalMatrix = transpose(inverse(mat3(u_view * u_model)));
-    a_normal = a_realnormal;
-    a_normal = normalMatrix * (false ? -a_normal : a_normal);
-    //a_normal = a_realnormal;
+    a_normal = calc_screen_normal(a_realnormal);
 
     vec3 light = v_light.rgb;
-    float torchlight = max(0.0, 1.0-distance(u_cameraPos, modelpos.xyz) /
-                       u_torchlightDistance);
+    float torchlight = calc_torch_light(a_modelpos.xyz);
     light += torchlight * u_torchlightColor;
     a_color = vec4(pow(light, vec3(u_gamma)),1.0f);
     a_texCoord = v_texCoord;
 
-    a_dir = modelpos.xyz - u_cameraPos;
-    vec3 skyLightColor = pick_sky_color(u_cubemap);
+    a_dir = a_modelpos.xyz - u_cameraPos;
+    vec3 skyLightColor = pick_sky_color(u_skybox);
     a_color.rgb = max(a_color.rgb, skyLightColor.rgb*v_light.a);
 
     a_distance = length(u_view * u_model * vec4(pos3d * FOG_POS_SCALE, 0.0));
-    float depth = (a_distance / 256.0);
-    a_fog = min(1.0, max(pow(depth * u_fogFactor, u_fogCurve),
-                         min(pow(depth * u_weatherFogDencity, u_weatherFogCurve), u_weatherFogOpacity)));
-    gl_Position = u_proj * u_view * modelpos;
+    a_fog = calc_fog(a_distance / 256.0);
 
-    a_position = (u_view * modelpos).xyz;
-    a_modelpos = modelpos;
+    vec4 viewmodelpos = u_view * a_modelpos;
+    a_position = viewmodelpos.xyz;
+    gl_Position = u_proj * viewmodelpos;
 }