scummvm/engines/myst3/nodecube.cpp

/* Residual - A 3D game interpreter
 *
 * Residual is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the AUTHORS
 * file distributed with this source distribution.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

#include "engines/myst3/nodecube.h"
#include "engines/myst3/directorysubentry.h"
#include "engines/myst3/myst3.h"

#include "common/debug.h"

namespace Myst3 {

NodeCube::NodeCube(Myst3Engine *vm, uint16 id) :
	Node(vm, id) {
	for (int i = 0; i < 6; i++) {
		const DirectorySubEntry *jpegDesc = _vm->getFileDescription(id, i + 1, DirectorySubEntry::kCubeFace);

		if (!jpegDesc)
			error("Face %d does not exist", id);

		Common::MemoryReadStream *jpegStream = jpegDesc->getData();

		if (jpegStream) {
			Graphics::JPEG jpeg;
			jpeg.read(jpegStream);

			_faces[i] = new Face();
			_faces[i]->setTextureFromJPEG(&jpeg);
			_faces[i]->markTextureDirty();

			delete jpegStream;
		}
	}
}

NodeCube::~NodeCube() {
}

void NodeCube::draw() {
	// Size of the cube
	float t = 1.0f;

	// Used fragment of the textures
	float s = 640 / (float)_cubeTextureSize;

	// Update the OpenGL textures if needed
	for (uint i = 0; i < 6; i++)
		_faces[i]->uploadTexture();

	glEnable(GL_TEXTURE_2D);
	glDepthMask(GL_FALSE);

	glBindTexture(GL_TEXTURE_2D, _faces[4]->_textureId);
	glBegin(GL_TRIANGLE_STRIP);			// X-
		glTexCoord2f(0, s); glVertex3f(-t,-t, t);
		glTexCoord2f(s, s); glVertex3f(-t,-t,-t);
		glTexCoord2f(0, 0); glVertex3f(-t, t, t);
		glTexCoord2f(s, 0); glVertex3f(-t, t,-t);
	glEnd();

	glBindTexture(GL_TEXTURE_2D, _faces[3]->_textureId);
	glBegin(GL_TRIANGLE_STRIP);			// X+
		glTexCoord2f(0, s); glVertex3f( t,-t,-t);
		glTexCoord2f(s, s); glVertex3f( t,-t, t);
		glTexCoord2f(0, 0); glVertex3f( t, t,-t);
		glTexCoord2f(s, 0); glVertex3f( t, t, t);
	glEnd();

	glBindTexture(GL_TEXTURE_2D, _faces[1]->_textureId);
	glBegin(GL_TRIANGLE_STRIP);			// Y-
		glTexCoord2f(0, s); glVertex3f( t,-t,-t);
		glTexCoord2f(s, s); glVertex3f(-t,-t,-t);
		glTexCoord2f(0, 0); glVertex3f( t,-t, t);
		glTexCoord2f(s, 0); glVertex3f(-t,-t, t);
	glEnd();

	glBindTexture(GL_TEXTURE_2D, _faces[5]->_textureId);
	glBegin(GL_TRIANGLE_STRIP);			// Y+
		glTexCoord2f(0, s); glVertex3f( t, t, t);
		glTexCoord2f(s, s); glVertex3f(-t, t, t);
		glTexCoord2f(0, 0); glVertex3f( t, t,-t);
		glTexCoord2f(s, 0); glVertex3f(-t, t,-t);
	glEnd();

	glBindTexture(GL_TEXTURE_2D, _faces[0]->_textureId);
	glBegin(GL_TRIANGLE_STRIP);			// Z-
		glTexCoord2f(0, s); glVertex3f(-t,-t,-t);
		glTexCoord2f(s, s); glVertex3f( t,-t,-t);
		glTexCoord2f(0, 0); glVertex3f(-t, t,-t);
		glTexCoord2f(s, 0); glVertex3f( t, t,-t);
	glEnd();

	glBindTexture(GL_TEXTURE_2D, _faces[2]->_textureId);
	glBegin(GL_TRIANGLE_STRIP);			// Z+
		glTexCoord2f(0, s); glVertex3f( t,-t, t);
		glTexCoord2f(s, s); glVertex3f(-t,-t, t);
		glTexCoord2f(0, 0); glVertex3f( t, t, t);
		glTexCoord2f(s, 0); glVertex3f(-t, t, t);
	glEnd();

	glDepthMask(GL_TRUE);
}

} /* namespace Myst3 */