#include "scene/SkyDome.h"

//#include <osgOcean/ShaderManager>

SkyDome::SkyDome(void) {

}

SkyDome::SkyDome(const SkyDome& copy, const osg::CopyOp& copyop) :
    SphereSegment(copy, copyop) {

}

SkyDome::SkyDome(float radius, unsigned int longSteps, unsigned int latSteps, osg::TextureCubeMap* cubemap) {
    Compute(radius, longSteps, latSteps, 90.f, 180.f, 0.f, 360.f);
    SetupStateSet(cubemap);
}

SkyDome::~SkyDome(void) {}

void SkyDome::Create(float radius, unsigned int latSteps, unsigned int longSteps, osg::TextureCubeMap* cubemap) {
    Compute(radius, longSteps, latSteps, 90.f, 180.f, 0.f, 360.f);
    SetupStateSet(cubemap);
}

void SkyDome::SetupStateSet(osg::TextureCubeMap* cubemap) {
    osg::StateSet* ss = new osg::StateSet;

    ss->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
    ss->setTextureAttributeAndModes(0, cubemap, osg::StateAttribute::ON);
    ss->setAttributeAndModes(createShader().get(), osg::StateAttribute::ON);
    ss->addUniform(new osg::Uniform("uEnvironmentMap", 0));

    setStateSet(ss);
}

osg::ref_ptr<osg::Program> SkyDome::createShader(void) {
    osg::ref_ptr<osg::Program> program = new osg::Program;

    // Do not use shaders if they were globally disabled.
   /* if (osgOcean::ShaderManager::instance().areShadersEnabled()) {
        char vertexSource[] =
            "varying vec3 vTexCoord;\n"
            "\n"
            "void main(void)\n"
            "{\n"
            "    gl_Position = ftransform();\n"
            "    vTexCoord = gl_Vertex.xyz;\n"
            "}\n";

        char fragmentSource[] =
            "uniform samplerCube uEnvironmentMap;\n"
            "varying vec3 vTexCoord;\n"
            "\n"
            "void main(void)\n"
            "{\n"
            "   vec3 texcoord = vec3(vTexCoord.x, vTexCoord.y, -vTexCoord.z);\n"
            "   gl_FragData[0] = textureCube( uEnvironmentMap, texcoord.xzy );\n"
            "   gl_FragData[0].a = 0.0;\n"
            "   gl_FragData[1] = vec4(0.0);\n"
            "}\n";

        program->setName("sky_dome_shader");
        program->addShader(new osg::Shader(osg::Shader::VERTEX, vertexSource));
        program->addShader(new osg::Shader(osg::Shader::FRAGMENT, fragmentSource));
    }*/

    return program;
}