// Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB).
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause

attribute vec3 vertexPosition;
attribute vec3 vertexNormal;
attribute vec4 vertexTangent;
attribute vec2 vertexTexCoord;

varying vec3 worldPosition;
varying vec3 worldNormal;
varying vec4 worldTangent;
varying vec2 texCoord;

uniform mat4 modelMatrix;
uniform mat3 modelNormalMatrix;
uniform mat4 modelViewProjection;

uniform float texCoordScale;

void main()
{
    // Pass through texture coordinates
    texCoord = vertexTexCoord * texCoordScale;

    // Transform position, normal, and tangent to world coords
    worldPosition = vec3(modelMatrix * vec4(vertexPosition, 1.0));
    worldNormal = normalize(modelNormalMatrix * vertexNormal);
    worldTangent.xyz = normalize(vec3(modelMatrix * vec4(vertexTangent.xyz, 0.0)));
    worldTangent.w = vertexTangent.w;

    // Calculate vertex position in clip coordinates
    gl_Position = modelViewProjection * vec4(vertexPosition, 1.0);
}
