cube-game-plus-plus/client/rendering/ChunkRenderer.cpp

#include "ChunkRenderer.h"

ChunkRenderer::ChunkRenderer()
{
    mesh = new ChunkMesh[chunkX * chunkZ * Chunk::HEIGHT_PARTIONS];
}

ChunkRenderer::~ChunkRenderer()
{
    delete[] mesh;
}

void ChunkRenderer::renderTick(Shader& shader, DirectRenderer& dr, float lag)
{
    //int frustumCull1 = 0;
    //int frustumCull2 = 0;
    for(int x = 0; x < chunkX; x++)
    {
        for(int z = 0; z < chunkZ; z++)
        {
            int sx = x * Chunk::WIDTH;
            int sz = z * Chunk::DEPTH;
            int ex = sx + Chunk::WIDTH;
            int ez = sz + Chunk::DEPTH;
            
            if(shader.isInFrustum(sx, 0, sz, ex, Chunk::HEIGHT, ez))
            {
                shader.translateTo(x * Chunk::WIDTH, 0, z * Chunk::DEPTH);
                shader.updateModelMatrix();

                for(int l = 0; l < Chunk::HEIGHT_PARTIONS; l++)
                {
                    if(shader.isInFrustum(sx, l * Chunk::PARTION_HEIGHT, sz, ex, (l + 1) * Chunk::PARTION_HEIGHT, ez))
                    {
                        mesh[l + z * Chunk::HEIGHT_PARTIONS + x * chunkZ * Chunk::HEIGHT_PARTIONS].draw();
                    }
                    //else
                    //{
                    //    frustumCull2++;
                    //}
                }
            }
            //else
            //{
            //    frustumCull1 += 16;
            //}
        }
    }
    //cout << "CULL :" << frustumCull1 << " " << frustumCull2 << endl;
}

void ChunkRenderer::updateChunk(Chunk& c, Chunk* north, Chunk* east, Chunk* south, Chunk* west)
{
    int x = c.getChunkX();
    int z = c.getChunkZ();
    if(x < 0 || x >= chunkX || z < 0 || z >= chunkZ)
    {
        return;
    }
    cout << "UPDATE: " << x << " " << z << endl;
    for(int l = 0; l < Chunk::HEIGHT_PARTIONS; l++)
    {
        if(c.isDirty(l))
        {
            buildChunk(l, c, north, east, south, west);
        }
    }
}

void ChunkRenderer::buildChunk(int partionY, Chunk& c, Chunk* north, Chunk* east, Chunk* south, Chunk* west)
{    
    Mesh& m = mesh[partionY + c.getChunkZ() * Chunk::HEIGHT_PARTIONS + c.getChunkX() * chunkZ * Chunk::HEIGHT_PARTIONS];
    
    int max = (partionY + 1) * Chunk::PARTION_HEIGHT;
    for(int y = partionY * Chunk::PARTION_HEIGHT; y < max; y++)
    {
        for(int x = 0; x < Chunk::WIDTH; x++)
        {
            for(int z = 0; z < Chunk::DEPTH; z++)
            {
                if(c.getBlock(x, y, z) == 1)
                {
                    // bottom
                    if(y <= 0 || c.getBlock(x, y - 1, z) != 1)
                    {
                        for(int i = 0; i < 6; i++)
                        {
                            m.addColor(1, 0, 0, 1);
                        }

                        //m.addTexture(0.125f, 0.0f);
                        //m.addTexture(0.1875f, 0.0f);
                        //m.addTexture(0.125f, 0.0625f);
                        //m.addTexture(0.1875f, 0.0f);
                        //m.addTexture(0.1875f, 0.0625f);
                        //m.addTexture(0.125f, 0.0625f);

                        for(int i = 0; i < 6; i++)
                        {
                            m.addNormal(0.0f, -1.0f, 0.0f);
                        }

                        m.addPosition(x + 0.0f, y + 0.0f, z + 0.0f);
                        m.addPosition(x + 1.0f, y + 0.0f, z + 0.0f);
                        m.addPosition(x + 0.0f, y + 0.0f, z + 1.0f);
                        m.addPosition(x + 1.0f, y + 0.0f, z + 0.0f);
                        m.addPosition(x + 1.0f, y + 0.0f, z + 1.0f);
                        m.addPosition(x + 0.0f, y + 0.0f, z + 1.0f);
                    }

                    // top
                    if(y + 1 >= Chunk::HEIGHT || c.getBlock(x, y + 1, z) != 1)
                    {
                        for(int i = 0; i < 6; i++)
                        {
                            m.addColor(1, 0, 0, 1);
                        }
                        
                        //m.addTexture(0.25f, 0.0f);
                        //m.addTexture(0.25f, 0.0625f);
                        //m.addTexture(0.3125f, 0.0f);
                        //m.addTexture(0.3125f, 0.0f);
                        //m.addTexture(0.25f, 0.0625f);
                        //m.addTexture(0.3125f, 0.0625f);

                        for(int i = 0; i < 6; i++)
                        {
                            m.addNormal(0.0f, 1.0f, 0.0f);
                        }

                        m.addPosition(x + 0.0f, y + 1.0f, z + 0.0f);
                        m.addPosition(x + 0.0f, y + 1.0f, z + 1.0f);
                        m.addPosition(x + 1.0f, y + 1.0f, z + 0.0f);
                        m.addPosition(x + 1.0f, y + 1.0f, z + 0.0f);
                        m.addPosition(x + 0.0f, y + 1.0f, z + 1.0f);
                        m.addPosition(x + 1.0f, y + 1.0f, z + 1.0f);
                    }

                    // right
                    if((x + 1 < Chunk::WIDTH && c.getBlock(x + 1, y, z) != 1) ||
                        (x + 1 >= Chunk::WIDTH && (north == nullptr || north->getBlock(x + 1 - Chunk::WIDTH, y, z) != 1)))
                    {
                        for(int i = 0; i < 6; i++)
                        {
                            m.addColor(1, 0, 0, 1);
                        }
                        
                        //m.addTexture(0.1875f, 0.0625f);
                        //m.addTexture(0.25f, 0.0f);
                        //m.addTexture(0.25f, 0.0625f);
                        //m.addTexture(0.1875f, 0.0625f);
                        //m.addTexture(0.1875f, 0.0f);
                        //m.addTexture(0.25f, 0.0f);

                        for(int i = 0; i < 6; i++)
                        {
                            m.addNormal(1.0f, 0.0f, 0.0f);
                        }

                        m.addPosition(x + 1.0f, y + 0.0f, z + 0.0f);
                        m.addPosition(x + 1.0f, y + 1.0f, z + 1.0f);
                        m.addPosition(x + 1.0f, y + 0.0f, z + 1.0f);
                        m.addPosition(x + 1.0f, y + 0.0f, z + 0.0f);
                        m.addPosition(x + 1.0f, y + 1.0f, z + 0.0f);
                        m.addPosition(x + 1.0f, y + 1.0f, z + 1.0f);
                    }

                    // left
                    if((x - 1 >= 0 && c.getBlock(x - 1, y, z) != 1) ||
                        (x - 1 < 0 && (south == nullptr || south->getBlock(x - 1 + Chunk::WIDTH, y, z) != 1)))
                    {
                        for(int i = 0; i < 6; i++)
                        {
                            m.addColor(1, 0, 0, 1);
                        }
                        
                        //m.addTexture(0.1875f, 0.0625f);
                        //m.addTexture(0.25f, 0.0625f);
                        //m.addTexture(0.25f, 0.0f);
                        //m.addTexture(0.1875f, 0.0625f);
                        //m.addTexture(0.25f, 0.0f);
                        //m.addTexture(0.1875f, 0.0f);

                        for(int i = 0; i < 6; i++)
                        {
                            m.addNormal(-1.0f, 0.0f, 0.0f);
                        }

                        m.addPosition(x + 0.0f, y + 0.0f, z + 0.0f);
                        m.addPosition(x + 0.0f, y + 0.0f, z + 1.0f);
                        m.addPosition(x + 0.0f, y + 1.0f, z + 1.0f);
                        m.addPosition(x + 0.0f, y + 0.0f, z + 0.0f);
                        m.addPosition(x + 0.0f, y + 1.0f, z + 1.0f);
                        m.addPosition(x + 0.0f, y + 1.0f, z + 0.0f);
                    }

                    // back
                    if((z + 1 < Chunk::DEPTH && c.getBlock(x, y, z + 1) != 1) ||
                        (z + 1 >= Chunk::DEPTH && (east == nullptr || east->getBlock(x, y, z + 1 - Chunk::DEPTH) != 1)))
                    {
                        for(int i = 0; i < 6; i++)
                        {
                            m.addColor(1, 0, 0, 1);
                        }
                        
                        //m.addTexture(0.1875f, 0.0625f);
                        //m.addTexture(0.25f, 0.0625f);
                        //m.addTexture(0.25f, 0.0f);
                        //m.addTexture(0.1875f, 0.0625f);
                        //m.addTexture(0.25f, 0.0f);
                        //m.addTexture(0.1875f, 0.0f);

                        for(int i = 0; i < 6; i++)
                        {
                            m.addNormal(0.0f, 0.0f, 1.0f);
                        }

                        m.addPosition(x + 0.0f, y + 0.0f, z + 1.0f);
                        m.addPosition(x + 1.0f, y + 0.0f, z + 1.0f);
                        m.addPosition(x + 1.0f, y + 1.0f, z + 1.0f);
                        m.addPosition(x + 0.0f, y + 0.0f, z + 1.0f);
                        m.addPosition(x + 1.0f, y + 1.0f, z + 1.0f);
                        m.addPosition(x + 0.0f, y + 1.0f, z + 1.0f);
                    }

                    // front
                    if((z - 1 >= 0 && c.getBlock(x, y, z - 1) != 1) ||
                        (z - 1 < 0 && (west == nullptr || west->getBlock(x, y, z - 1 + Chunk::DEPTH) != 1)))
                    {
                        for(int i = 0; i < 6; i++)
                        {
                            m.addColor(1, 0, 0, 1);
                        }
                        
                        //m.addTexture(0.1875f, 0.0625f);
                        //m.addTexture(0.25f, 0.0f);
                        //m.addTexture(0.25f, 0.0625f);
                        //m.addTexture(0.1875f, 0.0625f);
                        //m.addTexture(0.1875f, 0.0f);
                        //m.addTexture(0.25f, 0.0f);

                        for(int i = 0; i < 6; i++)
                        {
                            m.addNormal(0.0f, 0.0f, -1.0f);
                        }

                        m.addPosition(x + 0.0f, y + 0.0f, z + 0.0f);
                        m.addPosition(x + 1.0f, y + 1.0f, z + 0.0f);
                        m.addPosition(x + 1.0f, y + 0.0f, z + 0.0f);
                        m.addPosition(x + 0.0f, y + 0.0f, z + 0.0f);
                        m.addPosition(x + 0.0f, y + 1.0f, z + 0.0f);
                        m.addPosition(x + 1.0f, y + 1.0f, z + 0.0f);
                    }
                }
            }
        }
    }
    
    m.build();
}