------------
VERTEX PROGRAM:
------------

attribute vec4 a_position;
attribute vec4 a_color;
attribute vec2 a_texCoord0;
uniform mat4 u_proj;
uniform mat4 u_trans;
uniform mat4 u_projTrans;
varying vec4 v_color;
varying vec2 v_texCoords;

void main()
{
   v_color = a_color;
   v_texCoords = a_texCoord0;
   gl_Position =  u_projTrans * a_position;
}



------------
FRAGMENT PROGRAM:
------------

#ifdef GL_ES
precision mediump float;
#endif
varying vec4 v_color;
varying vec2 v_texCoords;
uniform sampler2D u_texture;
uniform sampler2D u_normals;
uniform vec3 light;
uniform vec3 ambientColor;
uniform float ambientIntensity; 
uniform vec2 resolution;
uniform vec3 lightColor;
uniform bool useNormals;
uniform bool useShadow;
uniform vec3 attenuation;

void main() {
	vec4 color = texture2D(u_texture, v_texCoords.st);
	vec3 normal = normalize(texture2D(u_normals, v_texCoords.st).rgb * 2.0 - 1.0);
	vec3 light_pos = normalize(light);
	float lambert = useNormals ? max(dot(normal, light_pos), 0.0) : 1.0;
	
	//now let's get a nice little falloff
	float d = distance(gl_FragCoord.xy, light.xy * resolution);
	d *= light.z;
	
	float att = useShadow ? 1.0 / ( attenuation.x + (attenuation.y*d) + (attenuation.z*d*d) ) : 1.0;
	
	vec3 result = (ambientColor * ambientIntensity) + (lightColor.rgb * lambert) * att;
	result *= color.rgb;
	
	gl_FragColor = v_color * vec4(result, color.a);
}