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// Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB).

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

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);