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106 lines
2.4 KiB
C++
106 lines
2.4 KiB
C++
//-----------------------------------------------------------------------------
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//
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// Copyright 1993-1996 id Software
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// Copyright 1999-2016 Randy Heit
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// Copyright 2016 Magnus Norddahl
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program 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
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see http://www.gnu.org/licenses/
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//
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//-----------------------------------------------------------------------------
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//
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#include <stdlib.h>
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#include <float.h>
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#include "templates.h"
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#include "i_system.h"
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#include "w_wad.h"
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#include "doomdef.h"
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#include "doomstat.h"
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#include "r_sky.h"
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#include "stats.h"
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#include "v_video.h"
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#include "a_sharedglobal.h"
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#include "c_console.h"
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#include "cmdlib.h"
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#include "d_net.h"
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#include "g_level.h"
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#include "a_dynlight.h"
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#include "swrenderer/plane/r_visibleplane.h"
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#include "swrenderer/plane/r_planerenderer.h"
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namespace swrenderer
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{
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void PlaneRenderer::RenderLines(VisiblePlane *pl)
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{
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// t1/b1 are at x
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// t2/b2 are at x+1
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// spanend[y] is at the right edge
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int x = pl->right - 1;
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int t2 = pl->top[x];
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int b2 = pl->bottom[x];
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if (b2 > t2)
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{
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fillshort(spanend + t2, b2 - t2, x);
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}
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for (--x; x >= pl->left; --x)
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{
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int t1 = pl->top[x];
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int b1 = pl->bottom[x];
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const int xr = x + 1;
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int stop;
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// Draw any spans that have just closed
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stop = MIN(t1, b2);
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while (t2 < stop)
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{
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int y = t2++;
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int x2 = spanend[y];
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RenderLine(y, xr, x2);
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}
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stop = MAX(b1, t2);
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while (b2 > stop)
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{
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int y = --b2;
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int x2 = spanend[y];
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RenderLine(y, xr, x2);
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}
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// Mark any spans that have just opened
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stop = MIN(t2, b1);
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while (t1 < stop)
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{
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spanend[t1++] = x;
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}
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stop = MAX(b2, t2);
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while (b1 > stop)
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{
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spanend[--b1] = x;
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}
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t2 = pl->top[x];
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b2 = pl->bottom[x];
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}
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// Draw any spans that are still open
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while (t2 < b2)
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{
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int y = --b2;
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int x2 = spanend[y];
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RenderLine(y, pl->left, x2);
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}
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}
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}
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