Movement bug with two+ pushable entities

This commit is contained in:
Logan Hunt 2022-04-02 23:27:07 -06:00
parent cf4dbf91dd
commit bb75e40de9
Signed by untrusted user who does not match committer: simponic
GPG Key ID: 52B3774857EB24B1
5 changed files with 32 additions and 14 deletions

2
src/bootstrap.js vendored
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@ -1,6 +1,6 @@
game.bootstrap = (() => {
const scripts = [
{ src: ['src/utils/objectEquivalence.js', 'src/utils/unitizeVector.js'], id: 'utils'},
{ src: ['src/utils/objectEquivalence.js', 'src/utils/unitizeVector.js', 'src/utils/clamp.js'], id: 'utils'},
{ src: ['src/render/graphics.js'], id: 'graphics' },
{ src: ['src/components/component.js'], id: 'component' },
{

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@ -26,7 +26,7 @@ game.initialize = () => {
game.entities = {};
Array(400).fill(null).forEach((_, i) => {
Array(10).fill(null).forEach((_, i) => {
const bigBlue = game.createBigBlue();
bigBlue.addComponent(game.components.GridPosition({x: Math.floor(Math.random() * 15), y: Math.floor(Math.random() * 13)}));
bigBlue.addComponent(game.components.Pushable());

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@ -52,18 +52,31 @@ game.system.GridSystem = ({ xDim, yDim, canvasWidth, canvasHeight }) => {
});
// TODO: Loop in momentum direction until we find an entity that does not have "push" component
const proposed = {x: entity.components.gridPosition.x + momentumVector.dx, y: entity.components.gridPosition.y + momentumVector.dy}
const proposed = {
x: entity.components.gridPosition.x + momentumVector.dx,
y: entity.components.gridPosition.y + momentumVector.dy
};
const entitiesInCell = entitiesGrid[proposed.x][proposed.y];
for (let id in entitiesInCell) {
if (entitiesInCell[id].hasComponent("pushable")) {
entitiesInCell[id].addComponent(game.components.Momentum({...momentumVector}));
const proposedCopy = {...proposed};
let found = false;
do {
found = false;
const entitiesInCell = entitiesGrid[proposedCopy.y][proposedCopy.x];
entitiesInCell.forEach((entity) => {
if (entity.hasComponent("pushable")) {
entity.addComponent(game.components.Momentum({...momentumVector}));
found = true;
}
});
proposedCopy.x += momentumVector.dx;
proposedCopy.y += momentumVector.dy;
const proposedCopyInBounds = clamp(proposedCopy, xDim, yDim);
if (!equivalence(proposedCopyInBounds, proposedCopy)) {
found = false;
}
} while (found);
entity.components.gridPosition.x = entity.components.gridPosition.x + momentumVector.dx;
entity.components.gridPosition.y = entity.components.gridPosition.y + momentumVector.dy;
entity.components.gridPosition = {...entity.components.gridPosition, ...proposed};
entity.components.position = {
...entity.components.position,

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@ -6,8 +6,7 @@ game.system.Physics = () => {
const {dx, dy} = entity.components.momentum;
entity.components.position.x += dx * elapsedTime;
entity.components.position.y += dy * elapsedTime;
entity.components.position.x = Math.max(0, Math.min(game.canvas.width - entity.components.appearance.width, entity.components.position.x));
entity.components.position.y = Math.max(0, Math.min(game.canvas.height - entity.components.appearance.height, entity.components.position.y));
entity.components.position = clamp(entity.components.position, game.canvas.width - entity.components.appearance.width, game.canvas.height - entity.components.appearance.height);
}
}
}

6
src/utils/clamp.js Normal file
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@ -0,0 +1,6 @@
const clamp = (vector, maxX, maxY) => {
const newVector = {...vector};
newVector.x = Math.max(0, Math.min(maxX, vector.x));
newVector.y = Math.max(0, Math.min(maxY, vector.y));
return newVector;
}