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/**
* @file llbox.cpp
* @brief Draws a box using display lists for speed.
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#include "llviewerprecompiledheaders.h"
#include "llbox.h"
#include "llgl.h"
#include "llrender.h"
#include "llglheaders.h"
LLBox gBox;
// These routines support multiple textures on a box
void LLBox::prerender()
{
F32 size = 1.f;
mTriangleCount = 6 * 2;
mVertex[0][0] = mVertex[1][0] = mVertex[2][0] = mVertex[3][0] = -size / 2;
mVertex[4][0] = mVertex[5][0] = mVertex[6][0] = mVertex[7][0] = size / 2;
mVertex[0][1] = mVertex[1][1] = mVertex[4][1] = mVertex[5][1] = -size / 2;
mVertex[2][1] = mVertex[3][1] = mVertex[6][1] = mVertex[7][1] = size / 2;
mVertex[0][2] = mVertex[3][2] = mVertex[4][2] = mVertex[7][2] = -size / 2;
mVertex[1][2] = mVertex[2][2] = mVertex[5][2] = mVertex[6][2] = size / 2;
}
// These routines support multiple textures on a box
void LLBox::cleanupGL()
{
// No GL state, a noop.
}
void LLBox::renderface(S32 which_face)
{
/*static F32 normals[6][3] =
{
{-1.0f, 0.0f, 0.0f},
{ 0.0f, 1.0f, 0.0f},
{ 1.0f, 0.0f, 0.0f},
{ 0.0f, -1.0f, 0.0f},
{ 0.0f, 0.0f, 1.0f},
{ 0.0f, 0.0f, -1.0f}
};*/
static S32 faces[6][4] =
{
{0, 1, 2, 3},
{3, 2, 6, 7},
{7, 6, 5, 4},
{4, 5, 1, 0},
{5, 6, 2, 1},
{7, 4, 0, 3}
};
gGL.begin(LLRender::TRIANGLES);
{
//gGL.normal3fv(&normals[which_face][0]);
gGL.texCoord2f(1.f, 0.f);
gGL.vertex3fv(&mVertex[faces[which_face][0]][0]);
gGL.texCoord2f(1.f, 1.f);
gGL.vertex3fv(&mVertex[faces[which_face][1]][0]);
gGL.texCoord2f(0.f, 1.f);
gGL.vertex3fv(&mVertex[faces[which_face][2]][0]);
gGL.texCoord2f(1.f, 0.f);
gGL.vertex3fv(&mVertex[faces[which_face][0]][0]);
gGL.texCoord2f(0.f, 1.f);
gGL.vertex3fv(&mVertex[faces[which_face][2]][0]);
gGL.texCoord2f(0.f, 0.f);
gGL.vertex3fv(&mVertex[faces[which_face][3]][0]);
}
gGL.end();
}
void LLBox::render()
{
// This is a flattend representation of the box as render here
// .
// (-++) (+++) /|\t
// +------------+ | (texture coordinates)
// |2 1| |
// | 4 | (*) --->s
// | TOP |
// | |
// (-++) (--+)|3 0|(+-+) (+++) (-++)
// +------------+------------+------------+------------+
// |2 1|2 1|2 1|2 1|
// | 0 | 1 | 2 | 3 |
// | BACK | RIGHT | FRONT | LEFT |
// | | | | |
// |3 0|3 0|3 0|3 0|
// +------------+------------+------------+------------+
// (-+-) (---)|2 1|(+--) (++-) (-+-)
// | 5 |
// | BOTTOM |
// | |
// |3 0|
// +------------+
// (-+-) (++-)
renderface(5);
renderface(4);
renderface(3);
renderface(2);
renderface(1);
renderface(0);
gGL.flush();
}
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