// Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause

#version 150 core

in vec3 vertexPosition;
in vec3 vertexNormal;

out vec4 positionInLightSpace;
out vec3 position;
out vec3 normal;

uniform mat4 lightViewProjection;
uniform mat4 modelMatrix;
uniform mat4 modelView;
uniform mat3 modelViewNormal;
uniform mat4 mvp;

void main()
{
    // positionInLightSpace = lightViewProjection * modelMatrix * vec4(vertexPosition, 1.0);
    const mat4 shadowMatrix = 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);

    positionInLightSpace = shadowMatrix * lightViewProjection * modelMatrix * vec4(vertexPosition, 1.0);

    normal = normalize(modelViewNormal * vertexNormal);
    position = vec3(modelView * vec4(vertexPosition, 1.0));

    gl_Position = mvp * vec4(vertexPosition, 1.0);
}