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/**
* @file llbox.cpp
* @brief Draws a box using display lists for speed.
*
* Copyright (c) 2001-$CurrentYear$, Linden Research, Inc.
* $License$
*/
#include "llviewerprecompiledheaders.h"
#include "llbox.h"
#include "llgl.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}
};
glBegin(GL_QUADS);
glNormal3fv(&normals[which_face][0]);
glTexCoord2f(1,0);
glVertex3fv(&mVertex[ faces[which_face][0] ][0]);
glTexCoord2f(1,1);
glVertex3fv(&mVertex[ faces[which_face][1] ][0]);
glTexCoord2f(0,1);
glVertex3fv(&mVertex[ faces[which_face][2] ][0]);
glTexCoord2f(0,0);
glVertex3fv(&mVertex[ faces[which_face][3] ][0]);
glEnd();
}
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);
}
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