//
// Simple passthrough vertex shader
//
attribute vec3 in_Position;
attribute vec3 in_Normal;
attribute vec2 in_TextureCoord;

varying vec2 v_vTexcoord;
varying float v_vNormalLight;

uniform vec3  u_LightForward;

void main() {
    vec4 object_space_pos = vec4( in_Position.x, in_Position.y, in_Position.z, 1.0);
	vec3 world_space_norm = normalize(mat3(gm_Matrices[MATRIX_WORLD]) * in_Normal);
	vec3 world_space_ligh = u_LightForward;
	
    gl_Position = gm_Matrices[MATRIX_WORLD_VIEW_PROJECTION] * object_space_pos;
    
	float illumination    = -dot(world_space_norm, world_space_ligh);
	
    v_vTexcoord = in_TextureCoord;
	v_vNormalLight = clamp(illumination, 0., 1.);
}

//######################_==_YOYO_SHADER_MARKER_==_######################@~
//
// Simple passthrough fragment shader
//
varying vec2 v_vTexcoord;
varying float v_vNormalLight;

uniform vec3  u_AmbientLight;
uniform vec3  u_LightColor;
uniform float u_LightIntensity;
uniform int useNormal;

void main() {
	vec4 dif = texture2D( gm_BaseTexture, v_vTexcoord );
	if(useNormal == 1) {
		vec4 lig = dif * (u_LightIntensity * vec4(u_LightColor, 1.));
		vec4 amb = dif * vec4(u_AmbientLight, 1.);
		float intensity = min(v_vNormalLight * u_LightIntensity, 1.);
		vec4 clr = mix(amb, lig, intensity);
		clr.a = dif.a;
		gl_FragColor = clr;
	} else 
		gl_FragColor = dif;
}