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304 lines
9 KiB
C#
Executable file
304 lines
9 KiB
C#
Executable file
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#region ================== Copyright (c) 2007 Pascal vd Heiden
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/*
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* Copyright (c) 2007 Pascal vd Heiden, www.codeimp.com
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* This program is released under GNU General Public License
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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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*/
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#endregion
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#region ================== Namespaces
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using System;
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using System.Collections.Generic;
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using CodeImp.DoomBuilder.Data;
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using CodeImp.DoomBuilder.Geometry;
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using CodeImp.DoomBuilder.GZBuilder.Data; //mxd
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using CodeImp.DoomBuilder.Map;
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using CodeImp.DoomBuilder.Rendering;
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#endregion
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namespace CodeImp.DoomBuilder.VisualModes
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{
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public abstract class VisualGeometry : IVisualPickable
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{
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#region ================== Constants
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private const float FOG_DENSITY_SCALER = -1.442692f / 512000f; //mxd. It's -1.442692f / 64000f in GZDoom...;
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private const int FADE_MULTIPLIER = 4; //mxd
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#endregion
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#region ================== Variables
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// Texture
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private ImageData texture;
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// Vertices
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private WorldVertex[] vertices;
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private int triangles;
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// Selected?
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protected bool selected;
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// Elements that this geometry is bound to
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// Only the sector is required, sidedef is only for walls
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private VisualSector sector;
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private Sidedef sidedef;
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/// <summary>
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/// Absolute intersecting coordinates are set during object picking. This is not set if the geometry is not bound to a sidedef.
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/// </summary>
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protected Vector3D pickintersect;
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/// <summary>
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/// Distance unit along the object picking ray is set during object picking. (0.0 is at camera, 1.0f is at far plane) This is not set if the geometry is not bound to a sidedef.
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/// </summary>
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protected double pickrayu;
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// Rendering
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private RenderPass renderpass = RenderPass.Solid;
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protected float fogfactor;
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// Sector buffer info
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private int vertexoffset;
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//mxd
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private Vector3D[] boundingBox;
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protected VisualGeometryType geometrytype;
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protected string partname; //UDMF part name
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protected bool renderassky;
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protected Vector2f skew;
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#endregion
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#region ================== Properties
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// Internal properties
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public WorldVertex[] Vertices { get { return vertices; } } //mxd
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internal int VertexOffset { get { return vertexoffset; } set { vertexoffset = value; } }
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public int Triangles { get { return triangles; } }
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//mxd
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public Vector3D[] BoundingBox { get { return boundingBox; } }
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public VisualGeometryType GeometryType { get { return geometrytype; } }
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public float FogFactor { get { return fogfactor; } set { fogfactor = value; } }
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public bool RenderAsSky { get { return renderassky; } }
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/// <summary>
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/// Render pass in which this geometry must be rendered. Default is Solid.
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/// </summary>
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public RenderPass RenderPass { get { return renderpass; } set { renderpass = value; } }
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/// <summary>
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/// Image to use as texture on this geometry.
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/// </summary>
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public ImageData Texture { get { return texture; } set { texture = value; } }
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/// <summary>
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/// Returns the VisualSector this geometry has been added to.
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/// </summary>
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public VisualSector Sector { get { return sector; } internal set { sector = value; } }
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/// <summary>
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/// Returns the Sidedef that this geometry is created for. Null for geometry that is sector-wide.
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/// </summary>
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public Sidedef Sidedef { get { return sidedef; } }
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/// <summary>
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/// Selected or not? This is only used by the core to determine what color to draw it with.
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/// </summary>
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public bool Selected { get { return selected; } set { selected = value; } }
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/// <summary>
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/// How much a texture is skewed.
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/// </summary>
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public Vector2f Skew { get { return skew; } }
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#endregion
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#region ================== Constructor / Destructor
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/// <summary>
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/// This creates sector-global visual geometry. This geometry is always visible when any of the sector is visible.
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/// </summary>
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protected VisualGeometry(VisualSector vs)
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{
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this.sector = vs;
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this.geometrytype = VisualGeometryType.UNKNOWN; //mxd
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skew = new Vector2f(0.0f);
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}
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/// <summary>
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/// This creates visual geometry that is bound to a sidedef. This geometry is only visible when the sidedef is visible. It is automatically back-face culled during rendering and automatically XY intersection tested as well as back-face culled during object picking.
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/// </summary>
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protected VisualGeometry(VisualSector vs, Sidedef sd)
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{
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this.sector = vs;
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this.sidedef = sd;
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this.geometrytype = VisualGeometryType.UNKNOWN; //mxd
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skew = new Vector2f(0.0f);
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}
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#endregion
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#region ================== Methods
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// This sets the vertices for this geometry
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protected void SetVertices(ICollection<WorldVertex> verts)
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{
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// Copy vertices
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if(verts != null) //mxd
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{
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vertices = new WorldVertex[verts.Count];
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verts.CopyTo(vertices, 0);
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triangles = vertices.Length / 3;
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CalculateNormals(); //mxd
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}
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else
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{
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vertices = null;
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triangles = 0;
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}
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if(sector != null) sector.NeedsUpdateGeo = true;
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}
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//mxd. Normals calculation algorithm taken from OpenGl wiki
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private void CalculateNormals()
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{
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if(triangles == 0) return;
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BoundingBoxSizes bbs = new BoundingBoxSizes(vertices[0]);
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for(int i = 0; i < triangles; i++)
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{
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int startindex = i * 3;
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WorldVertex p1 = vertices[startindex];
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WorldVertex p2 = vertices[startindex + 1];
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WorldVertex p3 = vertices[startindex + 2];
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Vector3f U = new Vector3f(p2.x - p1.x, p2.y - p1.y, p2.z - p1.z);
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Vector3f V = new Vector3f(p3.x - p1.x, p3.y - p1.y, p3.z - p1.z);
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p1.nx = p2.nx = p3.nx = -(U.Y * V.Z - U.Z * V.Y);
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p1.ny = p2.ny = p3.ny = -(U.Z * V.X - U.X * V.Z);
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p1.nz = p2.nz = p3.nz = -(U.X * V.Y - U.Y * V.X);
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vertices[startindex] = p1;
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vertices[startindex + 1] = p2;
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vertices[startindex + 2] = p3;
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BoundingBoxTools.UpdateBoundingBoxSizes(ref bbs, p1);
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BoundingBoxTools.UpdateBoundingBoxSizes(ref bbs, p2);
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BoundingBoxTools.UpdateBoundingBoxSizes(ref bbs, p3);
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}
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boundingBox = BoundingBoxTools.CalculateBoundingPlane(bbs);
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}
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//mxd. Calculate fogdistance
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//TODO: this doesn't match any GZDoom light mode...
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//GZDoom: gl_renderstate.h, SetFog();
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//GZDoom: gl_lightlevel.cpp gl_SetFog();
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protected float CalculateFogFactor(int brightness) { return CalculateFogFactor(Sector.Sector, brightness); }
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public static float CalculateFogFactor(Sector sector, int brightness)
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{
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float density;
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int fogdensity = (General.Map.UDMF ? General.Clamp(sector.Fields.GetValue("fogdensity", 0), 0, 510) : 0);
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switch(sector.FogMode)
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{
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case SectorFogMode.OUTSIDEFOGDENSITY:
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if(fogdensity < 3) fogdensity = General.Map.Data.MapInfo.OutsideFogDensity;
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density = fogdensity * FADE_MULTIPLIER;
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break;
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case SectorFogMode.FOGDENSITY:
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if(fogdensity < 3) fogdensity = General.Map.Data.MapInfo.FogDensity;
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density = fogdensity * FADE_MULTIPLIER;
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break;
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case SectorFogMode.FADE:
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if(fogdensity < 3) fogdensity = General.Clamp(255 - brightness, 30, 255);
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density = fogdensity * FADE_MULTIPLIER;
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break;
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case SectorFogMode.CLASSIC:
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density = General.Clamp(255 - brightness, 30, 255);
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break;
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case SectorFogMode.NONE:
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density = 0f;
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break;
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default: throw new NotImplementedException("Unknown SectorFogMode!");
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}
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return density * FOG_DENSITY_SCALER;
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}
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//mxd. Used to get proper sector from 3d-floors
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public virtual Sector GetControlSector()
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{
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return sector.Sector;
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}
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//mxd. Used to get proper linedef from 3d-floors
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public virtual Linedef GetControlLinedef()
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{
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return sidedef.Line;
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}
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// This keeps the results for a sidedef intersection
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internal void SetPickResults(Vector3D intersect, double u)
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{
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this.pickintersect = intersect;
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this.pickrayu = u;
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}
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/// <summary>
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/// This is called when the geometry must be tested for line intersection. This should reject
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/// as fast as possible to rule out all geometry that certainly does not touch the line.
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/// </summary>
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public virtual bool PickFastReject(Vector3D from, Vector3D to, Vector3D dir)
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{
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return false;
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}
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/// <summary>
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/// This is called when the geometry must be tested for line intersection. This should perform
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/// accurate hit detection and set u_ray to the position on the ray where this hits the geometry.
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/// </summary>
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public virtual bool PickAccurate(Vector3D from, Vector3D to, Vector3D dir, ref double u_ray)
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{
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return false;
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}
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//mxd
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public abstract void PerformAutoSelection();
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#endregion
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}
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//mxd
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public enum VisualGeometryType
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{
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FLOOR,
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CEILING,
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WALL_UPPER,
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WALL_MIDDLE,
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WALL_MIDDLE_3D,
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WALL_LOWER,
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FOG_BOUNDARY,
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UNKNOWN,
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}
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}
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