126 lines
3.8 KiB
C++
126 lines
3.8 KiB
C++
/**
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* @file llbox.cpp
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* @brief Draws a box using display lists for speed.
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*
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* $LicenseInfo:firstyear=2001&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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*/
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#include "llviewerprecompiledheaders.h"
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#include "llbox.h"
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#include "llgl.h"
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#include "llrender.h"
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#include "llglheaders.h"
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LLBox gBox;
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// These routines support multiple textures on a box
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void LLBox::prerender()
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{
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F32 size = 1.f;
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mTriangleCount = 6 * 2;
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mVertex[0][0] = mVertex[1][0] = mVertex[2][0] = mVertex[3][0] = -size / 2;
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mVertex[4][0] = mVertex[5][0] = mVertex[6][0] = mVertex[7][0] = size / 2;
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mVertex[0][1] = mVertex[1][1] = mVertex[4][1] = mVertex[5][1] = -size / 2;
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mVertex[2][1] = mVertex[3][1] = mVertex[6][1] = mVertex[7][1] = size / 2;
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mVertex[0][2] = mVertex[3][2] = mVertex[4][2] = mVertex[7][2] = -size / 2;
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mVertex[1][2] = mVertex[2][2] = mVertex[5][2] = mVertex[6][2] = size / 2;
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}
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// These routines support multiple textures on a box
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void LLBox::cleanupGL()
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{
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// No GL state, a noop.
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}
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void LLBox::renderface(S32 which_face)
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{
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/*static F32 normals[6][3] =
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{
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{-1.0f, 0.0f, 0.0f},
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{ 0.0f, 1.0f, 0.0f},
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{ 1.0f, 0.0f, 0.0f},
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{ 0.0f, -1.0f, 0.0f},
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{ 0.0f, 0.0f, 1.0f},
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{ 0.0f, 0.0f, -1.0f}
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};*/
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static S32 faces[6][4] =
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{
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{0, 1, 2, 3},
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{3, 2, 6, 7},
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{7, 6, 5, 4},
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{4, 5, 1, 0},
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{5, 6, 2, 1},
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{7, 4, 0, 3}
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};
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gGL.begin(LLRender::QUADS);
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//gGL.normal3fv(&normals[which_face][0]);
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gGL.texCoord2f(1,0);
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gGL.vertex3fv(&mVertex[ faces[which_face][0] ][0]);
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gGL.texCoord2f(1,1);
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gGL.vertex3fv(&mVertex[ faces[which_face][1] ][0]);
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gGL.texCoord2f(0,1);
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gGL.vertex3fv(&mVertex[ faces[which_face][2] ][0]);
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gGL.texCoord2f(0,0);
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gGL.vertex3fv(&mVertex[ faces[which_face][3] ][0]);
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gGL.end();
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}
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void LLBox::render()
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{
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// This is a flattend representation of the box as render here
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// .
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// (-++) (+++) /|\t
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// +------------+ | (texture coordinates)
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// |2 1| |
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// | 4 | (*) --->s
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// | TOP |
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// | |
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// (-++) (--+)|3 0|(+-+) (+++) (-++)
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// +------------+------------+------------+------------+
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// |2 1|2 1|2 1|2 1|
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// | 0 | 1 | 2 | 3 |
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// | BACK | RIGHT | FRONT | LEFT |
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// | | | | |
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// |3 0|3 0|3 0|3 0|
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// +------------+------------+------------+------------+
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// (-+-) (---)|2 1|(+--) (++-) (-+-)
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// | 5 |
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// | BOTTOM |
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// | |
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// |3 0|
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// +------------+
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// (-+-) (++-)
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renderface(5);
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renderface(4);
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renderface(3);
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renderface(2);
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renderface(1);
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renderface(0);
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gGL.flush();
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}
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