Add support for includes when loading shaders.

game/shaders/include/camera.glsl

@@ -0,0 +1,7 @@
+#ifndef CAMERA_INCLUDED
+#define CAMERA_INCLUDED
+
+uniform mat4 u_view; // world space -> view space
+uniform mat4 u_projection; // view space -> screen space
+
+#endif // CAMERA_INCLUDED

game/shaders/include/common.glsl

@@ -0,0 +1,20 @@
+#ifndef COMMON_INCLUDED
+#define COMMON_INCLUDED
+
+layout(binding=1) uniform highp sampler2D u_height_sampler;
+layout(binding=2) uniform highp sampler2D u_normal_sampler;
+
+const vec3 c_normal_scale = vec3(2.0, 2.0, 1.0);
+const vec3 c_normal_shift = vec3(-1.0, -1.0, 0.0);
+const vec2 c_st_scale = vec2(1.0 / 1023.0, 1.0 / 1023.0);
+const vec2 c_terrain_scale = vec2(1.0 / 2048.0, -1.0 / 2048.0);
+const vec2 c_terrain_shift = vec2(0.5, 0.5);
+const float c_weight_scale = 1.0 / 64.f;
+const vec3 c_world_forward = vec3(0.0, 1.0, 0.0);
+
+out vec4 v_position; // view space
+out vec4 v_normal; // view space
+out vec4 v_terrain_normal; // view space (x, y, z, weigth)
+out vec4 v_texcoord; // texture space (s, t, pixel_level, material_level)
+
+#endif // COMMON_INCLUDED

game/shaders/include/environment.glsl

@@ -0,0 +1,10 @@
+#ifndef ENVIRONMENT_INCLUDED
+#define ENVIRONMENT_INCLUDED
+
+uniform vec3 u_light_direction; // view space
+uniform vec3 u_light_color;
+uniform vec3 u_horizon_color;
+uniform vec3 u_sky_color;
+uniform vec3 u_sun_color;
+
+#endif // ENVIRONMENT_INCLUDED

game/shaders/include/vertex_format.glsl

@@ -0,0 +1,8 @@
+#ifndef VERTEX_FORMAT_INCLUDED
+#define VERTEX_FORMAT_INCLUDED
+
+layout(location = 0) in vec3 a_position; // model space
+layout(location = 1) in vec3 a_normal; // model space
+layout(location = 2) in vec3 a_texcoord; // texture space
+
+#endif // VERTEX_FORMAT_INCLUDED