mirror of
https://github.com/ZDoom/gzdoom-gles.git
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201 lines
6.6 KiB
C++
201 lines
6.6 KiB
C++
//
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// Copyright (C) 1993-1996 by id Software, Inc.
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//
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// This source is available for distribution and/or modification
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// only under the terms of the DOOM Source Code License as
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// published by id Software. All rights reserved.
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//
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// The source 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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// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
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// for more details.
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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 "g_levellocals.h"
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#include "swrenderer/scene/r_opaque_pass.h"
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#include "r_slopeplane.h"
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#include "swrenderer/scene/r_3dfloors.h"
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#include "v_palette.h"
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#include "r_data/colormaps.h"
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#include "swrenderer/drawers/r_draw_rgba.h"
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#include "gl/dynlights/gl_dynlight.h"
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#include "swrenderer/segments/r_clipsegment.h"
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#include "swrenderer/segments/r_drawsegment.h"
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#include "swrenderer/scene/r_portal.h"
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#include "swrenderer/scene/r_scene.h"
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#include "swrenderer/scene/r_light.h"
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#include "swrenderer/viewport/r_viewport.h"
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#include "swrenderer/plane/r_visibleplane.h"
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#include "swrenderer/r_memory.h"
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#include "swrenderer/r_renderthread.h"
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#ifdef _MSC_VER
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#pragma warning(disable:4244)
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#endif
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namespace swrenderer
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{
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RenderSlopePlane::RenderSlopePlane(RenderThread *thread)
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{
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Thread = thread;
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}
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void RenderSlopePlane::Render(VisiblePlane *pl, double _xscale, double _yscale, fixed_t alpha, bool additive, bool masked, FDynamicColormap *colormap, FTexture *texture)
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{
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static const float ifloatpow2[16] =
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{
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// ifloatpow2[i] = 1 / (1 << i)
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64.f, 32.f, 16.f, 8.f, 4.f, 2.f, 1.f, 0.5f,
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0.25f, 0.125f, 0.0625f, 0.03125f, 0.015625f, 0.0078125f,
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0.00390625f, 0.001953125f
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/*, 0.0009765625f, 0.00048828125f, 0.000244140625f,
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1.220703125e-4f, 6.103515625e-5, 3.0517578125e-5*/
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};
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double lxscale, lyscale;
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double xscale, yscale;
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FVector3 p, m, n;
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double ang, planeang, cosine, sine;
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double zeroheight;
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if (alpha <= 0)
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{
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return;
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}
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auto viewport = Thread->Viewport.get();
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drawerargs.SetSolidColor(3);
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drawerargs.SetTexture(Thread->Viewport.get(), texture);
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lxscale = _xscale * ifloatpow2[drawerargs.TextureWidthBits()];
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lyscale = _yscale * ifloatpow2[drawerargs.TextureHeightBits()];
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xscale = 64.f / lxscale;
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yscale = 64.f / lyscale;
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zeroheight = pl->height.ZatPoint(Thread->Viewport->viewpoint.Pos);
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pviewx = xs_ToFixed(32 - drawerargs.TextureWidthBits(), pl->xform.xOffs * pl->xform.xScale);
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pviewy = xs_ToFixed(32 - drawerargs.TextureHeightBits(), pl->xform.yOffs * pl->xform.yScale);
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planeang = (pl->xform.Angle + pl->xform.baseAngle).Radians();
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// p is the texture origin in view space
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// Don't add in the offsets at this stage, because doing so can result in
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// errors if the flat is rotated.
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ang = M_PI * 3 / 2 - Thread->Viewport->viewpoint.Angles.Yaw.Radians();
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cosine = cos(ang), sine = sin(ang);
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p[0] = Thread->Viewport->viewpoint.Pos.X * cosine - Thread->Viewport->viewpoint.Pos.Y * sine;
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p[2] = Thread->Viewport->viewpoint.Pos.X * sine + Thread->Viewport->viewpoint.Pos.Y * cosine;
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p[1] = pl->height.ZatPoint(0.0, 0.0) - Thread->Viewport->viewpoint.Pos.Z;
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// m is the v direction vector in view space
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ang = ang - M_PI / 2 - planeang;
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cosine = cos(ang), sine = sin(ang);
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m[0] = yscale * cosine;
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m[2] = yscale * sine;
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// m[1] = pl->height.ZatPointF (0, iyscale) - pl->height.ZatPointF (0,0));
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// VectorScale2 (m, 64.f/VectorLength(m));
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// n is the u direction vector in view space
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#if 0
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//let's use the sin/cosine we already know instead of computing new ones
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ang += M_PI / 2
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n[0] = -xscale * cos(ang);
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n[2] = -xscale * sin(ang);
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#else
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n[0] = xscale * sine;
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n[2] = -xscale * cosine;
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#endif
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// n[1] = pl->height.ZatPointF (ixscale, 0) - pl->height.ZatPointF (0,0));
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// VectorScale2 (n, 64.f/VectorLength(n));
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// This code keeps the texture coordinates constant across the x,y plane no matter
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// how much you slope the surface. Use the commented-out code above instead to keep
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// the textures a constant size across the surface's plane instead.
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cosine = cos(planeang), sine = sin(planeang);
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m[1] = pl->height.ZatPoint(Thread->Viewport->viewpoint.Pos.X + yscale * sine, Thread->Viewport->viewpoint.Pos.Y + yscale * cosine) - zeroheight;
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n[1] = -(pl->height.ZatPoint(Thread->Viewport->viewpoint.Pos.X - xscale * cosine, Thread->Viewport->viewpoint.Pos.Y + xscale * sine) - zeroheight);
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plane_su = p ^ m;
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plane_sv = p ^ n;
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plane_sz = m ^ n;
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plane_su.Z *= viewport->FocalLengthX;
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plane_sv.Z *= viewport->FocalLengthX;
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plane_sz.Z *= viewport->FocalLengthX;
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plane_su.Y *= viewport->IYaspectMul;
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plane_sv.Y *= viewport->IYaspectMul;
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plane_sz.Y *= viewport->IYaspectMul;
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// Premultiply the texture vectors with the scale factors
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plane_su *= 4294967296.f;
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plane_sv *= 4294967296.f;
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RenderPortal *renderportal = Thread->Portal.get();
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if (renderportal->MirrorFlags & RF_XFLIP)
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{
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plane_su[0] = -plane_su[0];
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plane_sv[0] = -plane_sv[0];
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plane_sz[0] = -plane_sz[0];
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}
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// [RH] set foggy flag
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basecolormap = colormap;
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bool foggy = level.fadeto || basecolormap->Fade || (level.flags & LEVEL_HASFADETABLE);;
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planelightfloat = (Thread->Light->SlopePlaneGlobVis(foggy) * lxscale * lyscale) / (fabs(pl->height.ZatPoint(Thread->Viewport->viewpoint.Pos) - Thread->Viewport->viewpoint.Pos.Z)) / 65536.f;
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if (pl->height.fC() > 0)
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planelightfloat = -planelightfloat;
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CameraLight *cameraLight = CameraLight::Instance();
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if (cameraLight->FixedLightLevel() >= 0)
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{
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drawerargs.SetLight(basecolormap, 0, cameraLight->FixedLightLevelShade());
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plane_shade = false;
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}
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else if (cameraLight->FixedColormap())
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{
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drawerargs.SetLight(cameraLight->FixedColormap(), 0, 0);
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plane_shade = false;
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}
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else
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{
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drawerargs.SetLight(basecolormap, 0, 0);
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plane_shade = true;
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planeshade = LightVisibility::LightLevelToShade(pl->lightlevel, foggy);
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}
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// Hack in support for 1 x Z and Z x 1 texture sizes
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if (drawerargs.TextureHeightBits() == 0)
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{
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plane_sv[2] = plane_sv[1] = plane_sv[0] = 0;
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}
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if (drawerargs.TextureWidthBits() == 0)
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{
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plane_su[2] = plane_su[1] = plane_su[0] = 0;
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}
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RenderLines(pl);
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}
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void RenderSlopePlane::RenderLine(int y, int x1, int x2)
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{
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drawerargs.DrawTiltedSpan(Thread, y, x1, x2, plane_sz, plane_su, plane_sv, plane_shade, planeshade, planelightfloat, pviewx, pviewy, basecolormap);
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}
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}
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