28 lines
786 B
C++
28 lines
786 B
C++
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#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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namespace UwU {
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class Tilemap {
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public:
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Tilemap() {
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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 u, uint16_t v) {
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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 = (u & 0x03f8) >> 3;
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uint16_t mapY = (v & 0x03f8) << 4;
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uint16_t tileIndex = tilemap[mapY + mapX];
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uint16_t u1 = (tileIndex & 0x003f) << 3;
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u1 += (u & 0x0007);
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uint16_t v1 = (tileIndex & 0x0fc0) >> 3;
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v1 += (v & 0x0007);
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return Coord2(u1, v1);
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}
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};
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}
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