Shaders

map.frag

#version 330

in vec2 v_tex_pos;
in vec3 v_light_dir_tansp;

out vec4 color;

uniform sampler2D tex;
uniform sampler2D normal_map;

void main() {
	vec3 norm = texture(normal_map, v_tex_pos).rgb * 2.0 - 1.0;
	float diffuse = dot(normalize(norm), normalize(v_light_dir_tansp));
	diffuse = clamp(diffuse, 0.0, 1.0);
	
	color = texture(tex, v_tex_pos) * diffuse;
}

map.vert

#version 330

in vec4 pos;
in vec3 norm;
in vec2 tex_pos;
in vec3 tangent;

out vec2 v_tex_pos;
out vec3 v_light_dir_tansp;

uniform mat4 view;
uniform mat4 view_projection;

const vec3 light_pos = vec3(50.0, 25.0, 50.0);

void main() {
	vec3 norm_viewsp = mat3(view) * normalize(norm);
	vec3 tangent_viewsp = mat3(view) * normalize(tangent);
	vec3 bitangent_viewsp = cross(tangent_viewsp, norm_viewsp);
	mat3 tbn = transpose(mat3(tangent_viewsp, bitangent_viewsp, norm_viewsp));
	vec3 light_dir = light_pos - pos.xyz;
	vec3 light_dir_viewsp = mat3(view) * light_dir;
	
	v_tex_pos = tex_pos;
	v_light_dir_tansp = tbn * light_dir_viewsp;
	
	gl_Position = view_projection * pos;
}