OpenSpace/modules/iswa/rendering/textureplane.cpp

// /*****************************************************************************************
//  *                                                                                       *
//  * OpenSpace                                                                             *
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//  * Copyright (c) 2014-2016                                                               *
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#include <modules/iswa/rendering/textureplane.h>
#include <openspace/engine/openspaceengine.h>
#include <openspace/rendering/renderengine.h>
#include <ghoul/filesystem/filesystem>
#include <ghoul/io/texture/texturereader.h>
#include <ghoul/opengl/programobject.h>
#include <ghoul/opengl/texture.h>
#include <ghoul/opengl/textureunit.h>
#include <modules/kameleon/include/kameleonwrapper.h>
#include <openspace/scene/scene.h>
#include <openspace/scene/scenegraphnode.h>
#include <openspace/util/time.h>
#include <openspace/util/spicemanager.h>

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

namespace openspace {

TexturePlane::TexturePlane() 
	:CygnetPlane()
	,_futureTexture(nullptr)
{
	_id = id();
	setName("TexturePlane" + std::to_string(_id));
	registerProperties();

	_fileExtension = "";
	_path = "";

	_cygnetId.onChange([this](){ 
		std::remove(absPath(_path).c_str());
		_fileExtension = "";
		_path = "";
		ISWAManager::ref().fileExtension(_cygnetId.value(), &_fileExtension);
	});
}


TexturePlane::~TexturePlane(){
    
}


bool TexturePlane::initialize(){
	_modelScale = glm::vec4(3, 3, 3, 10);
	_pscOffset  = glm::vec4(0, 0, 0, 1);

	CygnetPlane::initialize();

	ISWAManager::ref().fileExtension(_cygnetId.value(), &_fileExtension);

    return isReady();
}

bool TexturePlane::deinitialize(){
	CygnetPlane::deinitialize();

	glDeleteVertexArrays(1, &_quad);
	_quad = 0;

	glDeleteBuffers(1, &_vertexPositionBuffer);
	_vertexPositionBuffer = 0;

    RenderEngine& renderEngine = OsEng.renderEngine();
    if (_shader) {
        renderEngine.removeRenderProgram(_shader);
        _shader = nullptr;
    }

    std::remove(absPath(_path).c_str());

	return true;
}

void TexturePlane::render(){
	psc position = _parent->worldPosition();

	glm::mat4 transform = glm::mat4(1.0);
	transform = glm::inverse(OsEng.renderEngine().camera()->viewRotationMatrix());

	float textureRatio = (float (_texture->height()/float(_texture->width())));
	transform = glm::scale(transform, glm::vec3(1, textureRatio, 1));

	glm::mat4 rotx = glm::rotate(transform, static_cast<float>(M_PI_2), glm::vec3(1, 0, 0));
	glm::mat4 roty = glm::rotate(transform, static_cast<float>(M_PI_2), glm::vec3(0, 1, 0));
	// glm::mat4 rot = glm::mat4(1.0);
/*	for (int i = 0; i < 3; i++){
		for (int j = 0; j < 3; j++){
			transform[i][j] = static_cast<float>(_stateMatrix[i][j]);
		}
	}*/

	//transform = transform * roty * rotx;
	//position += transform*glm::vec4(-_pscOffset.x, _pscOffset.z, _pscOffset.y, _pscOffset.w); 

	// transform = glm::rotate(transform, _roatation.value()[0], glm::vec3(1,0,0));
	// transform = glm::rotate(transform, _roatation.value()[1], glm::vec3(0,1,0));
	// transform = glm::rotate(transform, _roatation.value()[2], glm::vec3(0,0,1));

	// Activate shader
	_shader->activate();
	glEnable(GL_ALPHA_TEST);
	glDisable(GL_CULL_FACE);
	_shader->setUniform("ViewProjection", OsEng.renderEngine().camera()->viewProjectionMatrix());
	_shader->setUniform("ModelTransform", transform);
	setPscUniforms(_shader.get(), OsEng.renderEngine().camera(), position);

	ghoul::opengl::TextureUnit unit;
	unit.activate();
	_texture->bind();
	_shader->setUniform("texture1", unit);

	glBindVertexArray(_quad);
	glDrawArrays(GL_TRIANGLES, 0, 6);
	glEnable(GL_CULL_FACE);
	
	_shader->deactivate();

}

void TexturePlane::update(){
	if(_path != ""){
		CygnetPlane::update();
		if(_futureTexture && _futureTexture->isFinished){
			_path = absPath("${OPENSPACE_DATA}/"+_futureTexture->filePath);
			loadTexture();

			delete _futureTexture; 
			_futureTexture = nullptr;
		}
	} else {
		if(_fileExtension == ""){
			//send new request
		} else{
			_path = "${OPENSPACE_DATA}/"+ name()+_fileExtension;
			updateTexture();
		}
	}
}

void TexturePlane::setParent(){
	_parent = OsEng.renderEngine().scene()->sceneGraphNode("Sun");
}

void TexturePlane::updateTexture(){
	DownloadManager::FileFuture* future = ISWAManager::ref().downloadImage(_cygnetId.value(), absPath(_path));
	if(future){
		_futureTexture = future;
	}
}

void TexturePlane::loadTexture() {

		std::unique_ptr<ghoul::opengl::Texture> texture = ghoul::io::TextureReader::ref().loadTexture(absPath(_path));

		if (texture) {
			LDEBUG("Loaded texture from '" << absPath(_path) << "'");

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

            _texture = std::move(texture);
		}
	
}

int TexturePlane::id(){
		static int id = 0;
		return id++;
}

}// namespace openspace