233 lines
9.0 KiB
C#
233 lines
9.0 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2013 The OpenRA Developers (see AUTHORS)
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* This file is part of OpenRA, which is free software. It is made
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* available to you under the terms of the GNU General Public License
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* as published by the Free Software Foundation. For more information,
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* see COPYING.
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*/
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#endregion
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using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Linq;
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namespace OpenRA.Graphics
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{
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public struct VoxelRenderable : IRenderable
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{
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readonly IEnumerable<VoxelAnimation> voxels;
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readonly WPos pos;
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readonly int zOffset;
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readonly WRot camera;
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readonly WRot lightSource;
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readonly float[] lightAmbientColor;
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readonly float[] lightDiffuseColor;
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readonly PaletteReference palette;
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readonly PaletteReference normalsPalette;
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readonly PaletteReference shadowPalette;
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readonly float scale;
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public VoxelRenderable(IEnumerable<VoxelAnimation> voxels, WPos pos, int zOffset, WRot camera, float scale,
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WRot lightSource, float[] lightAmbientColor, float[] lightDiffuseColor,
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PaletteReference color, PaletteReference normals, PaletteReference shadow)
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{
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this.voxels = voxels;
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this.pos = pos;
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this.zOffset = zOffset;
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this.scale = scale;
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this.camera = camera;
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this.lightSource = lightSource;
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this.lightAmbientColor = lightAmbientColor;
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this.lightDiffuseColor = lightDiffuseColor;
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this.palette = color;
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this.normalsPalette = normals;
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this.shadowPalette = shadow;
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}
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public WPos Pos { get { return pos; } }
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public float Scale { get { return scale; } }
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public PaletteReference Palette { get { return palette; } }
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public int ZOffset { get { return zOffset; } }
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public IRenderable WithScale(float newScale)
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{
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return new VoxelRenderable(voxels, pos, zOffset, camera, newScale,
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lightSource, lightAmbientColor, lightDiffuseColor,
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palette, normalsPalette, shadowPalette);
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}
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public IRenderable WithPalette(PaletteReference newPalette)
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{
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return new VoxelRenderable(voxels, pos, zOffset, camera, scale,
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lightSource, lightAmbientColor, lightDiffuseColor,
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newPalette, normalsPalette, shadowPalette);
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}
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public IRenderable WithZOffset(int newOffset)
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{
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return new VoxelRenderable(voxels, pos, newOffset, camera, scale,
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lightSource, lightAmbientColor, lightDiffuseColor,
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palette, normalsPalette, shadowPalette);
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}
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public IRenderable WithPos(WPos newPos)
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{
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return new VoxelRenderable(voxels, newPos, zOffset, camera, scale,
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lightSource, lightAmbientColor, lightDiffuseColor,
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palette, normalsPalette, shadowPalette);
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}
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public void Render(WorldRenderer wr)
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{
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// Depth and shadow buffers are cleared between actors so that
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// overlapping units and shadows behave like overlapping sprites.
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var vr = Game.Renderer.WorldVoxelRenderer;
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var draw = voxels.Where(v => v.DisableFunc == null || !v.DisableFunc());
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foreach (var v in draw)
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v.Voxel.PrepareForDraw(wr, pos + v.OffsetFunc(), v.RotationFunc(), camera,
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v.FrameFunc(), scale, lightSource);
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Game.Renderer.EnableDepthBuffer();
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Game.Renderer.EnableStencilBuffer();
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foreach (var v in draw)
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v.Voxel.DrawShadow(vr, shadowPalette.Index);
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Game.Renderer.DisableStencilBuffer();
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Game.Renderer.DisableDepthBuffer();
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Game.Renderer.EnableDepthBuffer();
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foreach (var v in draw)
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v.Voxel.Draw(vr, lightAmbientColor, lightDiffuseColor, palette.Index, normalsPalette.Index);
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Game.Renderer.DisableDepthBuffer();
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}
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public void RenderDebugGeometry(WorldRenderer wr)
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{
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var draw = voxels.Where(v => v.DisableFunc == null || !v.DisableFunc());
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var scaleTransform = Util.ScaleMatrix(scale, scale, scale);
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var pxOrigin = wr.ScreenPosition(pos);
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// Correct for bogus light source definition
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var shadowTransform = Util.MakeFloatMatrix(new WRot(new WAngle(256) - lightSource.Pitch,
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WAngle.Zero, lightSource.Yaw + new WAngle(512)).AsMatrix());
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var invShadowTransform = Util.MatrixInverse(shadowTransform);
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var cameraTransform = Util.MakeFloatMatrix(camera.AsMatrix());
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// TODO: Generalize this once we support sloped terrain
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var groundNormal = new float[] {0,0,1,1};
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var groundPos = new float[] {0, 0, 0.5f*(wr.ScreenPosition(pos).Y - wr.ScreenZPosition(pos, 0)), 1};
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var shadowGroundNormal = Util.MatrixVectorMultiply(shadowTransform, groundNormal);
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var shadowGroundPos = Util.MatrixVectorMultiply(shadowTransform, groundPos);
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// Sprite rectangle
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var tl = new float2(float.MaxValue, float.MaxValue);
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var br = new float2(float.MinValue, float.MinValue);
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// Shadow sprite rectangle
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var stl = new float2(float.MaxValue, float.MaxValue);
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var sbr = new float2(float.MinValue, float.MinValue);
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foreach (var v in draw)
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{
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var bounds = v.Voxel.Bounds(v.FrameFunc());
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var worldTransform = v.RotationFunc().Reverse().Aggregate(scaleTransform,
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(x,y) => Util.MatrixMultiply(x, Util.MakeFloatMatrix(y.AsMatrix())));
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var worldBounds = Util.MatrixAABBMultiply(worldTransform, bounds);
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var screenBounds = Util.MatrixAABBMultiply(cameraTransform, worldBounds);
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// Aggregate bounds rect
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var pxOffset = wr.ScreenVector(v.OffsetFunc());
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var pxPos = pxOrigin + new float2(pxOffset[0], pxOffset[1]);
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tl = float2.Min(tl, pxPos + new float2(screenBounds[0], screenBounds[1]));
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br = float2.Max(br, pxPos + new float2(screenBounds[3], screenBounds[4]));
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// Box to render the shadow image from
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var shadowBounds = Util.MatrixAABBMultiply(shadowTransform, worldBounds);
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var shadowPxOffset = Util.MatrixVectorMultiply(shadowTransform, pxOffset);
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stl = float2.Min(stl, new float2(shadowPxOffset[0] + shadowBounds[0], shadowPxOffset[1] + shadowBounds[1]));
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sbr = float2.Max(sbr, new float2(shadowPxOffset[0] + shadowBounds[3], shadowPxOffset[1] + shadowBounds[4]));
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// Draw voxel bounding box
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var screenTransform = Util.MatrixMultiply(cameraTransform, worldTransform);
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DrawBoundsBox(pxPos, screenTransform, bounds, Color.Yellow);
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}
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// Inflate rects by 1px each side to ensure rendering is within bounds
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var pad = new float2(1,1);
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tl -= pad;
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br += pad;
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stl -= pad;
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sbr += pad;
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// Corners of the shadow quad, in shadow-space
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var corners = new float[][]
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{
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new float[] {stl.X, stl.Y, 0, 1},
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new float[] {sbr.X, sbr.Y, 0, 1},
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new float[] {sbr.X, stl.Y, 0, 1},
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new float[] {stl.X, sbr.Y, 0, 1}
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};
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var shadowScreenTransform = Util.MatrixMultiply(cameraTransform, invShadowTransform);
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var screenCorners = new float2[4];
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for (var j = 0; j < 4; j++)
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{
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// Project to ground plane
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corners[j][2] -= (corners[j][2] - shadowGroundPos[2]) +
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(corners[j][1] - shadowGroundPos[1])*shadowGroundNormal[1]/shadowGroundNormal[2] +
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(corners[j][0] - shadowGroundPos[0])*shadowGroundNormal[0]/shadowGroundNormal[2];
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// Rotate to camera-space
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corners[j] = Util.MatrixVectorMultiply(shadowScreenTransform, corners[j]);
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screenCorners[j] = pxOrigin + new float2(corners[j][0], corners[j][1]);
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}
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// Draw transformed shadow sprite rect
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var c = Color.Purple;
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Game.Renderer.WorldLineRenderer.DrawLine(screenCorners[1], screenCorners[3], c, c);
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Game.Renderer.WorldLineRenderer.DrawLine(screenCorners[3], screenCorners[0], c, c);
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Game.Renderer.WorldLineRenderer.DrawLine(screenCorners[0], screenCorners[2], c, c);
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Game.Renderer.WorldLineRenderer.DrawLine(screenCorners[2], screenCorners[1], c, c);
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// Draw sprite rect
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Game.Renderer.WorldLineRenderer.DrawRect(tl, br, Color.Red);
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}
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static void DrawBoundsBox(float2 pxPos, float[] transform, float[] bounds, Color c)
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{
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// Corner offsets
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var ix = new uint[] {0,0,0,0,3,3,3,3};
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var iy = new uint[] {1,1,4,4,1,1,4,4};
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var iz = new uint[] {2,5,2,5,2,5,2,5};
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var corners = new float2[8];
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for (var i = 0; i < 8; i++)
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{
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var vec = new float[] {bounds[ix[i]], bounds[iy[i]], bounds[iz[i]], 1};
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var screen = Util.MatrixVectorMultiply(transform, vec);
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corners[i] = pxPos + new float2(screen[0], screen[1]);
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}
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Game.Renderer.WorldLineRenderer.DrawLine(corners[0], corners[1], c, c);
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Game.Renderer.WorldLineRenderer.DrawLine(corners[1], corners[3], c, c);
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Game.Renderer.WorldLineRenderer.DrawLine(corners[3], corners[2], c, c);
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Game.Renderer.WorldLineRenderer.DrawLine(corners[2], corners[0], c, c);
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Game.Renderer.WorldLineRenderer.DrawLine(corners[4], corners[5], c, c);
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Game.Renderer.WorldLineRenderer.DrawLine(corners[5], corners[7], c, c);
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Game.Renderer.WorldLineRenderer.DrawLine(corners[7], corners[6], c, c);
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Game.Renderer.WorldLineRenderer.DrawLine(corners[6], corners[4], c, c);
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Game.Renderer.WorldLineRenderer.DrawLine(corners[0], corners[4], c, c);
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Game.Renderer.WorldLineRenderer.DrawLine(corners[1], corners[5], c, c);
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Game.Renderer.WorldLineRenderer.DrawLine(corners[2], corners[6], c, c);
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Game.Renderer.WorldLineRenderer.DrawLine(corners[3], corners[7], c, c);
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}
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}
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}
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