//#version 100

uniform float contrast;
uniform bool altChecked;
uniform vec3 criticalHeights;

 varying vec4 varAmbientLight;
 varying vec4 varDiffuseLight;
 vec4 orangeAmbientLight = vec4(1.0, 0.72, 0.0, contrast);
 vec4 ambientLight = vec4(0.4, 0.4, 0.4, contrast);
vec4 redAmbientLight = vec4(1.0, 0.0, 0.0, contrast);
vec4 diffuseLight = vec4(0.6, 0.6, 0.6, contrast);
vec4 orangeDiffuseLight = vec4(1.0, 0.28, 0.0, contrast);
vec4 redDiffuseLight = vec4(1.0, 0.0, 0.0, contrast);
uniform vec3 lightVector;
attribute vec3 normal;
attribute vec4 vertex;
uniform mat4 matrix;
uniform mat4 proj;

 attribute vec2 texCoord;
 varying vec2 texc;
 varying float NdotL; //16
 vec4 frag_pos;

void main()
{
 varAmbientLight = ambientLight;
 varDiffuseLight = diffuseLight;
if(altChecked) //!!!!ALWAYS TRUE!!!!
{
 if(criticalHeights[2] < (vertex.z + criticalHeights[1] ))//500
  {
  varAmbientLight = redAmbientLight; varDiffuseLight = redDiffuseLight;
  }//25
 else
  {
  if(criticalHeights[2] < (vertex.z + criticalHeights[0]))//1000
   {varAmbientLight = orangeAmbientLight; varDiffuseLight = orangeDiffuseLight;};
  };
};


NdotL = max(dot(normal,lightVector), 0.0);
  frag_pos = matrix * vertex;
  gl_Position = proj*frag_pos;
  texc = texCoord;
}