#version 330


layout (location=0) in vec3 vsPosition;
layout (location=1) in vec2 vsTexture;


uniform mat4 worldViewProj;
uniform int transitionState;
uniform float transitionProgress=1.0;

out vec2 fsTexture;

void main()
{
    vec4 deltaTransIn=vec4(7.,5.,-16.,.0);
    vec4 transOffsetIn=vec4(3.5,2.5,-8.0,.0);
    
    vec4 deltaTransOut=vec4(-5.5,-4.,10.0,0.0);
    vec4 transOffsetOut=vec4(0.0,0.0,0.0,0.0);
    
    mat4 projection = mat4(
                           2.4140,0.0000,0.0000,0.0000,
                           0.0000,2.4140,0.0000,0.0000,
                           0.0000,0.0000,-1.020,-.4870,
                           0.0000,0.0000,-1.000,0.0000);
    mat4 translation=mat4(
                          1.0, 0.0, 0.0, 0.00,
                          0.0, 1.0, 0.0, 0.00,
                          0.0, 0.0, 1.0,-2.42,
                          0.0, 0.0, 0.0, 1.00);
    
    vec4 tmpPos=vec4(vsPosition.x,vsPosition.y,vsPosition.z,1.0)*worldViewProj;
    vec4 worldPos=tmpPos;

    if(transitionState==0)
    {
        float progress=transitionProgress*.5;
        transOffsetIn-=deltaTransIn*progress;
        float offset=(.5-progress)*6.5*transitionProgress;
        transOffsetIn.x-=offset;
        transOffsetIn.y-=offset;
        
        translation[0][3]+=transOffsetIn.x;
        translation[1][3]+=transOffsetIn.y;
        translation[2][3]+=transOffsetIn.z;
    }
    else if(transitionState==2)
    {
        float progress=-transitionProgress*.5;
        transOffsetOut-=deltaTransOut*progress;
        float offset=(.5-progress)*3.*transitionProgress;
        transOffsetOut.x-=offset;
        transOffsetOut.y-=offset;
        
        translation[0][3]+=transOffsetOut.x;
        translation[1][3]+=transOffsetOut.y;
        translation[2][3]+=transOffsetOut.z;
    }
    
    
    worldPos*=translation;
	gl_Position = worldPos*projection;
    
	fsTexture = vsTexture;
}
