uniform mat4 lightView, lightProjection;

const mat4 biasMatrix = mat4(   0.5, 0.0, 0.0, 0.0,
							0.0, 0.5, 0.0, 0.0,
							0.0, 0.0, 0.5, 0.0,
							0.5, 0.5, 0.5, 1.0);	    //bias from [-1, 1] to [0, 1]

void main()
{
gl_Position = ftransform();

mat4 shadowMatrix = biasMatrix * lightProjection * lightView;
shadowTexCoord = shadowMatrix * gl_Vertex;
}

uniform sampler2DShadow shadowmap;
varying vec4 shadowTexCoord;

void main()
{
vec4 shadow = shadow2DProj(shadowmap, shadowTexCoord, 0.0);
float colorshadow = shadow.r < 0.1 ? 0.5 : 1.0;

vec4 color = vec4(1,1,1,1);

gl_FragColor = vec4( color*colorshadow, color.w );

gl_Position = gl_ProjectionMatrix * (gl_ModelViewMatrix * gl_Vertex)

uniform mat4 lightView, lightProjection;
uniform mat4 camView, camProj, modelTrans;
const mat4 biasMatrix = mat4(   0.5, 0.0, 0.0, 0.0,
                                                        0.0, 0.5, 0.0, 0.0,
                                                        0.0, 0.0, 0.5, 0.0,
                                                        0.5, 0.5, 0.5, 1.0);        //bias from [-1, 1] to [0, 1]

void main()
{
mat4 modelViewProjMatrix =  camProj * camView * modelTrans;
gl_Position =  modelViewProjMatrix * gl_Vertex;

mat4 shadowMatrix = biasMatrix * lightProjection * lightView * modelTrans;
shadowTexCoord = shadowMatrix * gl_Vertex;
}