31 lines
972 B
C++
31 lines
972 B
C++
#pragma once
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#include <stdint.h>
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#include "../datatypes.cpp"
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#include "../helpers.cpp"
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#include "mapperbase.cpp"
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namespace UwU {
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class TileMapper : public MapperBase<TileMapper> { // not actually tilemapping yet
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public:
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TileMapper() {
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this->tileMap = new uint16_t[16384]; // the map of tile positions 128x128 8x8 tiles from a 512x512 bitmap space
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}
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uint16_t* tileMap;
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Coord2 map(uint16_t x0, uint16_t y0, uint16_t x, uint16_t y) {
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uint16_t u0 = x - x0;
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uint16_t v0 = y - y0;
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// returns uv coordinates that point to a specific pixel of a specific tile on a tilesheet buffer
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uint16_t mapX = (u0 & 0x03f8) >> 3;
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uint16_t mapY = (v0 & 0x03f8) << 4;
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uint16_t tileIndex = tileMap[mapY + mapX];
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uint16_t u = (tileIndex & 0x003f) << 3;
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u += (u0 & 0x0007);
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uint16_t v = (tileIndex & 0x0fc0) >> 3;
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v += (v0 & 0x0007);
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return Coord2(u, v);
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}
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};
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} |