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// BiomeRenderer.cpp
// Implements the cBiomeRenderer class representing the rendering engine
#include "Globals.h"
#include "BiomeRenderer.h"
#include "Pixmap.h"
#include "Timer.h"
#include "BiomeColors.h"
cBiomeRenderer::cBiomeRenderer(void) :
m_OriginX(160),
m_OriginY(160),
m_Zoom(1)
{
}
void cBiomeRenderer::SetSource(cBiomeSource * a_Source)
{
m_Cache.SetSource(a_Source);
}
bool cBiomeRenderer::Render(cPixmap & a_Pixmap)
{
cTimer Timer("cBiomeRenderer::Render");
int Wid = a_Pixmap.GetWidth();
int Hei = a_Pixmap.GetHeight();
// Hint the approximate view area to the biome source so that it can adjust its caches:
int MinBlockX = ( - m_OriginX) * m_Zoom;
int MaxBlockX = (Wid - m_OriginX) * m_Zoom;
int MinBlockZ = ( - m_OriginY) * m_Zoom;
int MaxBlockZ = (Hei - m_OriginY) * m_Zoom;
m_Cache.HintViewArea(MinBlockX / 16 - 1, MaxBlockX / 16 + 1, MinBlockZ / 16 - 1, MaxBlockZ / 16 + 1);
// Hold one current chunk of biome data:
int CurChunkX = -10000;
int CurChunkZ = -10000;
cChunkDef::BiomeMap CurBiomes;
bool res = false;
for (int y = 0; y < Hei; y++)
{
int BlockZ = (y - m_OriginY) * m_Zoom;
int ChunkZ = (BlockZ >= 0) ? (BlockZ / 16) : ((BlockZ + 1) / 16 - 1);
int RelZ = BlockZ - ChunkZ * 16;
for (int x = 0; x < Wid; x++)
{
int BlockX = (x - m_OriginX) * m_Zoom;
int ChunkX = (BlockX >= 0) ? (BlockX / 16) : ((BlockX + 1) / 16 - 1);
int RelX = BlockX - ChunkX * 16;
if ((ChunkZ != CurChunkZ) || (ChunkX != CurChunkX))
{
CurChunkX = ChunkX;
CurChunkZ = ChunkZ;
switch (m_Cache.GetBiome(CurChunkX, CurChunkZ, CurBiomes))
{
case cBiomeSource::baLater:
{
res = true;
// fallthrough:
}
case cBiomeSource::baNever:
{
for (int i = 0; i < ARRAYCOUNT(CurBiomes); i++)
{
CurBiomes[i] = biInvalidBiome;
}
break;
}
} // switch (Biome availability)
}
EMCSBiome Biome = cChunkDef::GetBiome(CurBiomes, RelX, RelZ);
a_Pixmap.SetPixel(x, y, GetBiomeColor(Biome));
} // for x
} // for y
return res;
}
int cBiomeRenderer::GetBiomeColor(EMCSBiome a_Biome)
{
if ((a_Biome < 0) || (a_Biome >= ARRAYCOUNT(g_BiomeColors)))
{
return 0xff0000;
}
return g_BiomeColors[a_Biome];
}
void cBiomeRenderer::MoveViewBy(int a_OffsX, int a_OffsY)
{
m_OriginX += a_OffsX;
m_OriginY += a_OffsY;
}
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