67 lines
2.0 KiB
C++
67 lines
2.0 KiB
C++
//
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// Created by Wouter Groeneveld on 30/11/18.
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//
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#include "ConwayScene.h"
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#include "bg.h"
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#include <libgba-sprite-engine/gba_engine.h>
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#include <libgba-sprite-engine/sprites/sprite_builder.h>
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#include <libgba-sprite-engine/gba/tonc_core.h>
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#include <libgba-sprite-engine/background/text_stream.h>
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// See http://www.coranac.com/tonc/text/gfx.htm#cd-qran
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int __qran_seed= 42; // Seed / rnd holder
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std::vector<Sprite *> ConwayScene::sprites() {
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return {};
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}
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std::vector<Background *> ConwayScene::backgrounds() {
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return { bg.get() };
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}
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u16 ConwayScene::getNextState(int x, int y, int pos) {
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int amountAlive = countAmountOfNeighbouringCellsAlive(pos, x, y);
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int currentState = map[pos];
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// speed optimization: skip the ifs. "? ALIVE : DEAD" can also be skipped if you're sure they are 1 and 0.
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return (amountAlive == 3 || (amountAlive == 2 && (currentState == ALIVE))) ? ALIVE : DEAD;
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}
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int ConwayScene::countAmountOfNeighbouringCellsAlive(int pos, int x, int y) {
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int amountOfNeightbouringCellsAlive = 0;
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for(int x_i = x - 1; x_i <= x + 1; x_i++) {
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for(int y_j = y - 1; y_j <= y + 1; y_j++) {
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int toCheckPos = y_j * MAP_WIDTH + x_i;
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if(toCheckPos >= 0 && toCheckPos < MAP_SIZE - 1 && pos != toCheckPos && map[toCheckPos] == ALIVE) {
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amountOfNeightbouringCellsAlive++;
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}
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}
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}
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return amountOfNeightbouringCellsAlive;
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}
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void ConwayScene::load() {
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backgroundPalette = std::unique_ptr<BackgroundPaletteManager>(new BackgroundPaletteManager(conway_palette, sizeof(conway_palette)));
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seedRandomMap(((MAP_WIDTH * MAP_HEIGHT) / 100) * percentageSeed);
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bg = std::unique_ptr<Background>(new Background(1, conway_data, sizeof(conway_data), map, sizeof(map)));
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bg.get()->useMapScreenBlock(16);
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postload();
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}
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void ConwayScene::seedRandomMap(int seedcount) {
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for(int i = 0; i < seedcount; i++) {
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int x = qran_range(0, MAP_WIDTH);
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int y = qran_range(0, MAP_HEIGHT);
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map[y * MAP_WIDTH + x] = ALIVE;
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}
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}
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