mirror of
https://github.com/ClassiCube/ClassiCube.git
synced 2025-09-24 05:10:42 -04:00
246 lines
9.2 KiB
C#
246 lines
9.2 KiB
C#
using System;
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using ClassicalSharp.GraphicsAPI;
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using OpenTK;
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namespace ClassicalSharp {
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public partial class MapRenderer : IDisposable {
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// Render solid and fully transparent to fill depth buffer.
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// These blocks are treated as having an alpha value of either none or full.
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void RenderNormal() {
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int[] texIds = game.TerrainAtlas1D.TexIds;
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api.SetBatchFormat( VertexFormat.Pos3fTex2fCol4b );
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api.Texturing = true;
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api.AlphaTest = true;
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for( int batch = 0; batch < _1DUsed; batch++ ) {
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if( pendingNormal[batch] || usedNormal[batch] ) {
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api.BindTexture( texIds[batch] );
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RenderNormalBatch( batch );
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pendingNormal[batch] = false;
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}
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}
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api.AlphaTest = false;
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api.Texturing = false;
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DebugPickedPos();
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}
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// Render translucent(liquid) blocks. These 'blend' into other blocks.
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void RenderTranslucent() {
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Block block = game.LocalPlayer.BlockAtHead;
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drawAllFaces = block == Block.Water || block == Block.StillWater;
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// First fill depth buffer
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int[] texIds = game.TerrainAtlas1D.TexIds;
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api.SetBatchFormat( VertexFormat.Pos3fTex2fCol4b );
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api.Texturing = false;
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api.AlphaBlending = false;
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api.ColourWrite = false;
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for( int batch = 0; batch < _1DUsed; batch++ ) {
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if( pendingTranslucent[batch] || usedTranslucent[batch] ) {
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RenderTranslucentBatchDepthPass( batch );
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pendingTranslucent[batch] = false;
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}
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}
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// Then actually draw the transluscent blocks
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api.AlphaBlending = true;
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api.Texturing = true;
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api.ColourWrite = true;
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api.DepthWrite = false; // we already calculated depth values in depth pass
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for( int batch = 0; batch < _1DUsed; batch++ ) {
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if( !usedTranslucent[batch] ) continue;
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api.BindTexture( texIds[batch] );
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RenderTranslucentBatch( batch );
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}
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api.DepthWrite = true;
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api.AlphaTest = false;
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api.AlphaBlending = false;
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api.Texturing = false;
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}
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const DrawMode mode = DrawMode.Triangles;
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const int maxVertex = 65536;
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const int maxIndices = maxVertex / 4 * 6;
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void RenderNormalBatch( int batch ) {
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for( int i = 0; i < chunks.Length; i++ ) {
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ChunkInfo info = chunks[i];
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if( info.NormalParts == null || !info.Visible || info.Occluded ) continue;
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ChunkPartInfo part = info.NormalParts[batch];
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if( part.IndicesCount == 0 ) continue;
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usedNormal[batch] = true;
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if( part.IndicesCount > maxIndices ) {
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DrawBigPart( info, ref part );
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} else {
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DrawPart( info, ref part );
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}
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if( part.spriteCount > 0 )
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api.DrawIndexedVb_TrisT2fC4b( part.spriteCount, 0 );
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game.Vertices += part.IndicesCount;
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}
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}
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void RenderTranslucentBatch( int batch ) {
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for( int i = 0; i < chunks.Length; i++ ) {
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ChunkInfo info = chunks[i];
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if( info.TranslucentParts == null || !info.Visible || info.Occluded ) continue;
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ChunkPartInfo part = info.TranslucentParts[batch];
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if( part.IndicesCount == 0 ) continue;
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DrawTranslucentPart( info, ref part );
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game.Vertices += part.IndicesCount;
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}
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}
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void RenderTranslucentBatchDepthPass( int batch ) {
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for( int i = 0; i < chunks.Length; i++ ) {
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ChunkInfo info = chunks[i];
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if( info.TranslucentParts == null || !info.Visible || info.Occluded ) continue;
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ChunkPartInfo part = info.TranslucentParts[batch];
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if( part.IndicesCount == 0 ) continue;
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usedTranslucent[batch] = true;
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DrawTranslucentPart( info, ref part );
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}
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}
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void DrawPart( ChunkInfo info, ref ChunkPartInfo part ) {
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api.BindVb( part.VbId );
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bool drawLeft = info.DrawLeft && part.leftCount > 0;
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bool drawRight = info.DrawRight && part.rightCount > 0;
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bool drawBottom = info.DrawBottom && part.bottomCount > 0;
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bool drawTop = info.DrawTop && part.topCount > 0;
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bool drawFront = info.DrawFront && part.frontCount > 0;
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bool drawBack = info.DrawBack && part.backCount > 0;
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if( drawLeft && drawRight ) {
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api.FaceCulling = true;
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api.DrawIndexedVb_TrisT2fC4b( part.leftCount + part.rightCount, part.leftIndex );
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api.FaceCulling = false;
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} else if( drawLeft ) {
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api.DrawIndexedVb_TrisT2fC4b( part.leftCount, part.leftIndex );
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} else if( drawRight ) {
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api.DrawIndexedVb_TrisT2fC4b( part.rightCount, part.rightIndex );
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}
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if( drawFront && drawBack ) {
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api.FaceCulling = true;
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api.DrawIndexedVb_TrisT2fC4b( part.frontCount + part.backCount, part.frontIndex );
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api.FaceCulling = false;
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} else if( drawFront ) {
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api.DrawIndexedVb_TrisT2fC4b( part.frontCount, part.frontIndex );
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} else if( drawBack ) {
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api.DrawIndexedVb_TrisT2fC4b( part.backCount, part.backIndex );
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}
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if( drawBottom && drawTop ) {
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api.FaceCulling = true;
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api.DrawIndexedVb_TrisT2fC4b( part.bottomCount + part.topCount, part.bottomIndex );
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api.FaceCulling = false;
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} else if( drawBottom ) {
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api.DrawIndexedVb_TrisT2fC4b( part.bottomCount, part.bottomIndex );
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} else if( drawTop ) {
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api.DrawIndexedVb_TrisT2fC4b( part.topCount, part.topIndex );
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}
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}
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bool drawAllFaces = false;
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void DrawTranslucentPart( ChunkInfo info, ref ChunkPartInfo part ) {
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api.BindVb( part.VbId );
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bool drawLeft = (drawAllFaces || info.DrawLeft) && part.leftCount > 0;
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bool drawRight = (drawAllFaces || info.DrawRight) && part.rightCount > 0;
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bool drawBottom = (drawAllFaces || info.DrawBottom) && part.bottomCount > 0;
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bool drawTop = (drawAllFaces || info.DrawTop) && part.topCount > 0;
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bool drawFront = (drawAllFaces || info.DrawFront) && part.frontCount > 0;
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bool drawBack = (drawAllFaces || info.DrawBack) && part.backCount > 0;
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if( drawLeft && drawRight ) {
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api.DrawIndexedVb_TrisT2fC4b( part.leftCount + part.rightCount, part.leftIndex );
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} else if( drawLeft ) {
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api.DrawIndexedVb_TrisT2fC4b( part.leftCount, part.leftIndex );
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} else if( drawRight ) {
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api.DrawIndexedVb_TrisT2fC4b( part.rightCount, part.rightIndex );
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}
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if( drawFront && drawBack ) {
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api.DrawIndexedVb_TrisT2fC4b( part.frontCount + part.backCount, part.frontIndex );
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} else if( drawFront ) {
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api.DrawIndexedVb_TrisT2fC4b( part.frontCount, part.frontIndex );
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} else if( drawBack ) {
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api.DrawIndexedVb_TrisT2fC4b( part.backCount, part.backIndex );
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}
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if( drawBottom && drawTop ) {
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api.DrawIndexedVb_TrisT2fC4b( part.bottomCount + part.topCount, part.bottomIndex );
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} else if( drawBottom ) {
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api.DrawIndexedVb_TrisT2fC4b( part.bottomCount, part.bottomIndex );
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} else if( drawTop ) {
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api.DrawIndexedVb_TrisT2fC4b( part.topCount, part.topIndex );
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}
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}
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void DrawBigPart( ChunkInfo info, ref ChunkPartInfo part ) {
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api.BindVb( part.VbId );
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bool drawLeft = info.DrawLeft && part.leftCount > 0;
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bool drawRight = info.DrawRight && part.rightCount > 0;
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bool drawBottom = info.DrawBottom && part.bottomCount > 0;
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bool drawTop = info.DrawTop && part.topCount > 0;
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bool drawFront = info.DrawFront && part.frontCount > 0;
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bool drawBack = info.DrawBack && part.backCount > 0;
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if( drawLeft && drawRight ) {
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api.FaceCulling = true;
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api.DrawIndexedVb_TrisT2fC4b( part.leftCount + part.rightCount, part.leftIndex );
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api.FaceCulling = false;
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} else if( drawLeft ) {
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api.DrawIndexedVb_TrisT2fC4b( part.leftCount, part.leftIndex );
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} else if( drawRight ) {
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api.DrawIndexedVb_TrisT2fC4b( part.rightCount, part.rightIndex );
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}
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if( drawFront && drawBack ) {
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api.FaceCulling = true;
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api.DrawIndexedVb_TrisT2fC4b( part.frontCount + part.backCount, part.frontIndex );
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api.FaceCulling = false;
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} else if( drawFront ) {
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api.DrawIndexedVb_TrisT2fC4b( part.frontCount, part.frontIndex );
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} else if( drawBack ) {
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api.DrawIndexedVb_TrisT2fC4b( part.backCount, part.backIndex );
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}
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// Special handling for top and bottom as these can go over 65536 vertices and we need to adjust the indices in this case.
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if( drawBottom && drawTop ) {
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api.FaceCulling = true;
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if( part.IndicesCount > maxIndices ) {
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int part1Count = maxIndices - part.bottomIndex;
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api.DrawIndexedVb_TrisT2fC4b( part1Count, part.bottomIndex );
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api.DrawIndexedVb_TrisT2fC4b( part.bottomCount + part.topCount - part1Count, maxVertex, 0 );
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} else {
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api.DrawIndexedVb_TrisT2fC4b( part.bottomCount + part.topCount, part.bottomIndex );
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}
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api.FaceCulling = false;
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} else if( drawBottom ) {
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int part1Count;
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if( part.IndicesCount > maxIndices &&
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( part1Count = maxIndices - part.bottomIndex ) < part.bottomCount ) {
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api.DrawIndexedVb_TrisT2fC4b( part1Count, part.bottomIndex );
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api.DrawIndexedVb_TrisT2fC4b( part.bottomCount - part1Count, maxVertex, 0 );
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} else {
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api.DrawIndexedVb_TrisT2fC4b( part.bottomCount, part.bottomIndex );
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}
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} else if( drawTop ) {
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int part1Count;
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if( part.IndicesCount > maxIndices &&
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( part1Count = maxIndices - part.topIndex ) < part.topCount ) {
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api.DrawIndexedVb_TrisT2fC4b( part1Count, part.topIndex );
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api.DrawIndexedVb_TrisT2fC4b( part.topCount - part1Count, maxVertex, 0 );
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} else {
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api.DrawIndexedVb_TrisT2fC4b( part.topCount, part.topIndex );
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}
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}
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}
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}
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} |