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+/****************************************************************************
+**
+** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt3D module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#version 150 core
+
+uniform mat4 viewMatrix;
+
+uniform vec3 lightPosition;
+uniform vec3 lightIntensity;
+
+uniform vec3 ka; // Ambient reflectivity
+uniform float shininess; // Specular shininess factor
+uniform float opacity; // Alpha channel
+
+uniform sampler2D diffuseTexture;
+uniform sampler2D specularTexture;
+uniform sampler2D normalTexture;
+
+uniform sampler2DShadow shadowMapTexture;
+
+in vec4 positionInLightSpace;
+
+in vec3 lightDir;
+in vec3 viewDir;
+in vec2 texCoord;
+
+out vec4 fragColor;
+
+void dsbModel(const in vec3 norm, const in vec2 flipYTexCoord, out vec3 ambientAndDiff, out vec3 spec)
+{
+ // Reflection of light direction about normal
+ vec3 r = reflect(-lightDir, norm);
+
+ vec3 diffuseColor = texture(diffuseTexture, flipYTexCoord).rgb;
+ vec3 specularColor = texture(specularTexture, flipYTexCoord).rgb;
+
+ // Calculate the ambient contribution
+ vec3 ambient = lightIntensity * ka * diffuseColor;
+
+ // Calculate the diffuse contribution
+ float sDotN = max(dot(lightDir, norm), 0.0);
+ vec3 diffuse = lightIntensity * diffuseColor * sDotN;
+
+ // Sum the ambient and diffuse contributions
+ ambientAndDiff = ambient + diffuse;
+
+ // Calculate the specular highlight contribution
+ spec = vec3(0.0);
+ if (sDotN > 0.0)
+ spec = (lightIntensity * (shininess / (8.0 * 3.14))) * pow(max(dot(r, viewDir), 0.0), shininess);
+
+ spec *= specularColor;
+}
+
+void main()
+{
+ vec2 flipYTexCoord = texCoord;
+ flipYTexCoord.y = 1.0 - texCoord.y;
+
+ float shadowMapSample = textureProj(shadowMapTexture, positionInLightSpace);
+
+ // Sample the textures at the interpolated texCoords
+ vec4 normal = 2.0 * texture(normalTexture, flipYTexCoord) - vec4(1.0);
+
+ vec3 result = lightIntensity * ka * texture(diffuseTexture, flipYTexCoord).rgb;
+
+ // Calculate the lighting model, keeping the specular component separate
+ vec3 ambientAndDiff, spec;
+ if (shadowMapSample > 0) {
+ dsbModel(normalize(normal.xyz), flipYTexCoord, ambientAndDiff, spec);
+ result = ambientAndDiff + spec;
+ }
+
+ // Combine spec with ambient+diffuse for final fragment color
+ fragColor = vec4(result, opacity);
+}