initial commit

shaders/mesh/vertex_point.glsl

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+layout (location = 0) uniform mat4 mvp_matrix;
+layout (location = 2) uniform float point_size;
+layout (location = 0) in vec3 vertex_position;
+layout (location = 0) out vec4 frag_color;
+
+#ifdef TEXTURE
+layout (location = 3) uniform sampler2D tex;
+layout (location = 2) in vec2 vertex_tex_coord;
+#endif
+
+#ifdef LIGHTING
+layout (location = 1) uniform mat4 model_matrix;
+layout (location = 4) uniform vec3 view_pos;
+layout (location = 5) uniform vec3 point_light_direction;
+layout (location = 6) uniform vec3 point_light_color;
+layout (location = 7) uniform vec3 ambient_light_color;
+layout (location = 8) uniform vec3 ambient_filter;
+layout (location = 9) uniform vec3 diffuse_filter;
+layout (location = 10) uniform vec3 specular_filter;
+layout (location = 11) uniform float shininess;
+layout (location = 1) in vec3 vertex_normal;
+#endif
+
+#ifdef U_ALPHA
+layout (location = 12) uniform float alpha;
+#endif
+
+void main() {
+
+    gl_Position = mvp_matrix * vec4(vertex_position, 1.0);
+    gl_PointSize = point_size / gl_Position.w;
+
+    frag_color = vec4(1);
+
+#ifdef TEXTURE
+    frag_color *= texture(tex, vertex_tex_coord);
+#endif
+
+#ifdef U_ALPHA
+    frag_color.w *= alpha;
+#endif
+
+#ifdef LIGHTING
+    vec3 position = (model_matrix * vec4(vertex_position, 1.0)).xyz;
+    vec3 normal = normalize(mat3(model_matrix) * vertex_normal);
+ 
+    vec3 ambient = frag_color.rgb * ambient_filter * ambient_light_color;
+
+    float point_light_alignment = max(dot(normal, point_light_direction), 0.0);
+    vec3 diffuse = frag_color.rgb * diffuse_filter * point_light_color * point_light_alignment;
+
+    vec3 reflection_dir = reflect(-point_light_direction, normal);
+    vec3 view_dir = normalize(position - view_pos);
+    float specular_strength = pow(max(dot(view_dir, reflection_dir), 0.0), shininess);
+    vec3 specular = specular_filter * point_light_color * specular_strength;
+
+    frag_color.rgb *= ambient + diffuse + specular;
+#endif
+}