OpenSpace/src/rendering/planets/renderableplanet.cpp

/*****************************************************************************************
*                                                                                       *
* OpenSpace                                                                             *
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* Copyright (c) 2014                                                                    *
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// open space includes
#include <openspace/rendering/planets/renderableplanet.h>
#include <openspace/util/constants.h>
#include <openspace/rendering/planets/planetgeometry.h>

#include <ghoul/opengl/texturereader.h>
#include <ghoul/opengl/textureunit.h>
#include <ghoul/filesystem/filesystem.h>

#include <openspace/util/time.h>
#include <openspace/util/spicemanager.h>

#include <openspace/engine/openspaceengine.h>
#include <sgct.h>

namespace {
const std::string _loggerCat = "RenderablePlanet";
}

namespace openspace {

RenderablePlanet::RenderablePlanet(const ghoul::Dictionary& dictionary)
    : Renderable(dictionary)
	, _colorTexturePath("colorTexture", "Color Texture")
    , _programObject(nullptr)
    , _texture(nullptr)
    , _geometry(nullptr)
{
	std::string name;
	bool success = dictionary.getValue(constants::scenegraphnode::keyName, name);
	assert(success);

    std::string path;
    success = dictionary.getValue(constants::scenegraph::keyPathModule, path);
	assert(success);

    ghoul::Dictionary geometryDictionary;
    success = dictionary.getValue(
		constants::renderableplanet::keyGeometry, geometryDictionary);
	if (success) {
		geometryDictionary.setValue(constants::scenegraphnode::keyName, name);
        geometryDictionary.setValue(constants::scenegraph::keyPathModule, path);
        _geometry = planetgeometry::PlanetGeometry::createFromDictionary(geometryDictionary);
	}

	dictionary.getValue(constants::renderableplanet::keyFrame, _target);

    // TODO: textures need to be replaced by a good system similar to the geometry as soon
    // as the requirements are fixed (ab)
    std::string texturePath = "";
	success = dictionary.getValue("Textures.Color", texturePath);
	if (success)
        _colorTexturePath = path + "/" + texturePath;

	addPropertySubOwner(_geometry);

	addProperty(_colorTexturePath);
    _colorTexturePath.onChange(std::bind(&RenderablePlanet::loadTexture, this));
}

RenderablePlanet::~RenderablePlanet()
{
    deinitialize();
}

bool RenderablePlanet::initialize()
{
    bool completeSuccess = true;
    if (_programObject == nullptr)
        completeSuccess
              &= OsEng.ref().configurationManager().getValue("pscShader", _programObject);

    loadTexture();
    completeSuccess &= (_texture != nullptr);

    completeSuccess &= _geometry->initialize(this);

    return completeSuccess;
}

bool RenderablePlanet::deinitialize()
{
    _geometry->deinitialize();
    delete _geometry;
    _geometry = nullptr;
    delete _texture;
    _texture = nullptr;
    return true;
}

void RenderablePlanet::render(const RenderData& data)
{
	if (!_programObject)
		return;
	if (!_texture)
		return;

    // activate shader
    _programObject->activate();

    PowerScaledScalar scaling = glm::vec2(1, -6);

    // scale the planet to appropriate size since the planet is a unit sphere
    glm::mat4 transform = glm::mat4(1);
	
	//earth needs to be rotated for that to work.
	glm::mat4 rot = glm::rotate(transform, 90.f, glm::vec3(1, 0, 0));
		
	for (int i = 0; i < 3; i++){
		for (int j = 0; j < 3; j++){
			transform[i][j] = _stateMatrix[i][j];
		}
	}
	transform = transform* rot;
	
	glm::mat4 modelview = data.camera.viewMatrix()*data.camera.modelMatrix();
	glm::vec4 camSpaceEye = -(modelview*data.position.vec4());

    // setup the data to the shader
	_programObject->setUniform("camdir", camSpaceEye);
	_programObject->setUniform("ViewProjection", data.camera.viewProjectionMatrix());
	_programObject->setUniform("ModelTransform", transform);
	setPscUniforms(_programObject, &data.camera, data.position);
	
    // Bind texture
    ghoul::opengl::TextureUnit unit;
    unit.activate();
    _texture->bind();
    _programObject->setUniform("texture1", unit);

    // render
    _geometry->render();

    // disable shader
    _programObject->deactivate();

}

void RenderablePlanet::update(const UpdateData& data)
{
	// set spice-orientation in accordance to timestamp
	openspace::SpiceManager::ref().getPositionTransformMatrix("GALACTIC", "IAU_EARTH", data.time, _stateMatrix);

}

void RenderablePlanet::loadTexture()
{
    delete _texture;
    _texture = nullptr;
    if (_colorTexturePath.value() != "") {
        _texture = ghoul::opengl::loadTexture(absPath(_colorTexturePath));
        if (_texture) {
            LDEBUG("Loaded texture from '" << absPath(_colorTexturePath) << "'");
			_texture->uploadTexture();

			// Textures of planets looks much smoother with AnisotropicMipMap rather than linear
			_texture->setFilter(ghoul::opengl::Texture::FilterMode::AnisotropicMipMap);
        }
    }
}

}  // namespace openspace