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night rendering

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This commit is contained in:
sfan5 2020-05-08 18:50:00 +02:00
parent 2979dc5b6b
commit 55e407c130
3 changed files with 44 additions and 4 deletions
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7
BlockDecoder.cpp
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@ -151,3 +151,10 @@ std::string BlockDecoder::getNode(u8 x, u8 y, u8 z) const
}
return it->second;
}
u8 BlockDecoder::getParam1(u8 x, u8 y, u8 z) const
{
unsigned int position = x + (y << 4) + (z << 8);
unsigned int offset = (m_contentWidth == 2) ? 0x2000 : 0x1000;
return m_mapData.c_str()[offset + position];
}

40
TileGenerator.cpp
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@ -8,6 +8,7 @@
#include <stdexcept>
#include <cstring>
#include <vector>
#include <cmath>
#include "TileGenerator.h"
#include "config.h"
@ -495,8 +496,6 @@ void TileGenerator::renderMap()
blk.reset();
blk.decode(it.second);
if (blk.isEmpty())
continue;
renderMapBlock(blk, pos);
// Exit out if all pixels for this MapBlock are covered
@ -576,6 +575,28 @@ void TileGenerator::renderMap()
void TileGenerator::renderMapBlock(const BlockDecoder &blk, const BlockPos &pos)
{
/***/
static bool light_curve_init = false;
static float light_curve[16];
if (!light_curve_init) {
for (u8 i = 0; i < 16; i++)
light_curve[i] = expf((i - 15) / 12.0f);
light_curve_init = true;
}
/***/
auto light_at = [blk] (u8 x, u8 y, u8 z) -> u8 {
return blk.getParam1(x, y, z) >> 4; // night bank
};
static u8 m_light[16][16];
if (blk.isEmpty()) {
for (int z = 0; z < 16; ++z) {
for (int x = 0; x < 16; ++x) {
m_light[z][x] = light_at(x, 0, z);
}
}
return;
}
int xBegin = (pos.x - m_xMin) * 16;
int zBegin = (m_zMax - pos.z) * 16;
int minY = (pos.y * 16 > m_yMin) ? 0 : m_yMin - pos.y * 16;
@ -589,14 +610,25 @@ void TileGenerator::renderMapBlock(const BlockDecoder &blk, const BlockPos &pos)
for (int y = maxY; y >= minY; --y) {
string name = blk.getNode(x, y, z);
if (name == "")
if (name == "") {
if (y == 0) m_light[z][x] = light_at(x, 0, z);
continue;
}
ColorMap::const_iterator it = m_colorMap.find(name);
if (it == m_colorMap.end()) {
m_unknownNodes.insert(name);
continue;
}
const Color c = it->second.to_color();
Color c = it->second.to_color();
u8 light = (y == 15) ? m_light[z][x] : light_at(x, y+1, z);
if (light < 15) light = mymax(light, light_at(x, y, z));
if (1) {
float l2 = light_curve[light];
c.r = colorSafeBounds(c.r * l2);
c.g = colorSafeBounds(c.g * l2);
c.b = colorSafeBounds(c.b * l2);
} else
c = Color(light * 17, light * 17, light * 17);
if (m_drawAlpha) {
if (m_color[z][x].a == 0)
m_color[z][x] = c; // first visible time, no color mixing

1
include/BlockDecoder.h
View File

@ -13,6 +13,7 @@ public:
void decode(const ustring &data);
bool isEmpty() const;
std::string getNode(u8 x, u8 y, u8 z) const; // returns "" for air, ignore and invalid nodes
u8 getParam1(u8 x, u8 y, u8 z) const;
private:
typedef std::unordered_map<int, std::string> NameMap;