#version 130

precision highp float;

const vec3 ambient = vec3(0, 0.0, 0.0);
const vec3 lightVecNormalized = normalize(vec3(0.0, 0.5, 0.0));
const vec3 lightColor = vec3(0.0, 0.0, 0.5);
uniform sampler2D tex;

in vec3 normal;

out vec4 out_frag_color;

void main(void)
{
  float diffuse = clamp(dot(lightVecNormalized, normalize(normal)), 0.0, 1.0);
    vec4 color = texture2D(tex,gl_TexCoord[0].st);

  //out_frag_color = vec4(color + (ambient+ diffuse * lightColor), 1.0);
    out_frag_color = color+vec4(ambient+ diffuse * lightColor, 0.5);
}
#version 130

precision highp float;

uniform mat4 projection_matrix;
uniform mat4 modelview_matrix;
attribute vec4 gl_MultiTexCoord0;
in vec3 in_position;
in vec3 in_normal;
in vec4 in_texture;

out vec3 normal;

void main(void)
{
  gl_TexCoord[0] = in_texture;
  //works only for orthogonal modelview
  normal = (modelview_matrix * vec4(in_normal, 0)).xyz;
  gl_Position = projection_matrix * modelview_matrix * vec4(in_position, 1);
}