1 files changed, 93 insertions, 0 deletions
diff --git a/Homework/cs5410/bbiy/src/systems/collision.js b/Homework/cs5410/bbiy/src/systems/collision.js
new file mode 100644
index 0000000..0732c74
--- /dev/null
+++ b/Homework/cs5410/bbiy/src/systems/collision.js
@@ -0,0 +1,93 @@
+game.system.Collision = (entitiesGrid) => {
+  const update = (elapsedTime, entities, changedIds) => {
+    const thisChangedIds = new Set();
+    for (let entity of Object.keys(entities).map((id) => entities[id])) {
+      if (entity.hasComponent("position") && entity.hasComponent("gridPosition") && (entity.hasComponent("burnable") || entity.hasComponent("sinkable")) && entity.hasComponent("alive")) {
+        for (let collided of entitiesGrid[entity.components.gridPosition.y][entity.components.gridPosition.x].values()) {
+          if (!equivalence(entity, collided) && collided.hasComponent("alive")){
+            if (entity.hasComponent("burnable") && collided.hasComponent("burn")) {
+              const burnedParticleSpawner = game.createBorderParticles({colors: ["#f58d42", "#d6600b", "#c7a312", "#f2b844"]});
+              burnedParticleSpawner.addComponent(game.components.Position(collided.components.position));
+              burnedParticleSpawner.addComponent(game.components.Appearance({width: game.canvas.width / game.config.xDim, height: game.canvas.height / game.config.yDim}));
+              game.entities[burnedParticleSpawner.id] = burnedParticleSpawner;
+              entity.removeComponent("alive");
+              game.assets.death.play();
+              break;
+            } else if (entity.hasComponent("sinkable") && collided.hasComponent("sink")) {
+              const sunkParticleSpawner = game.createBorderParticles({colors: ["#16f7c9", "#0d6e5a", "#2fa18a", "#48cfb4", "#58877d", "#178054", "#2cdb92"]});
+              sunkParticleSpawner.addComponent(game.components.Position(collided.components.position));
+              sunkParticleSpawner.addComponent(game.components.Appearance({width: game.canvas.width / game.config.xDim, height: game.canvas.height / game.config.yDim}));
+              game.entities[sunkParticleSpawner.id] = sunkParticleSpawner;
+              entity.removeComponent("alive");
+              collided.removeComponent("alive");
+              game.assets.death.play();
+              break;
+            }
+          }
+        }
+      }
+      if (entity.hasComponent("controllable") && entity.hasComponent("gridPosition")) {
+        for (let collided of entitiesGrid[entity.components.gridPosition.y][entity.components.gridPosition.x].values()) {
+          if (collided.hasComponent("win")) {
+            game.assets.win.play();
+            game.win = true;
+            game.systems.menu.bringUpMenu();
+            game.systems.menu.setState("levelSelect");
+          }
+        }
+
+        if (entity.hasComponent("momentum")) {
+          const momentum = unitize(entity.components.momentum);
+
+          let found;
+          const proposed = {x: entity.components.gridPosition.x + momentum.dx, y: entity.components.gridPosition.y + momentum.dy};
+          const entitiesToPush = [];
+          let wall = false;
+          do {
+            const proposedClampedInBounds = clamp(proposed, game.config.xDim-1, game.config.yDim-1);
+            if (!equivalence(proposed, proposedClampedInBounds)) {
+              break;
+            }
+
+            found = false;
+
+            const entitiesInCell = entitiesGrid[proposed.y][proposed.x];
+
+            for (let next of entitiesInCell.values()) {
+              if (next.hasComponent("alive")) {
+                if (next.hasComponent("stop")) {
+                  wall = next;
+                  found = false;
+                  break;
+                }
+                if (next.hasComponent("pushable")) {
+                  entitiesToPush.push(next);
+                  found = true;
+                }
+              }
+            }
+
+            proposed.x += momentum.dx;
+            proposed.y += momentum.dy;
+          } while(found);
+
+          if (wall) {
+            entity.removeComponent("momentum");
+          } else {
+            game.assets.move.play();
+            entitiesToPush.map((e) => {
+              const pushedParticleSpawner = game.createBorderParticles({maxSpeed: 0.1, minAmount: 10, maxAmount: 15});
+              pushedParticleSpawner.addComponent(game.components.Position(e.components.position));
+              pushedParticleSpawner.addComponent(game.components.Appearance({width: game.canvas.width / game.config.xDim, height: game.canvas.height / game.config.yDim}));
+              game.entities[pushedParticleSpawner.id] = pushedParticleSpawner;
+
+              e.addComponent(game.components.Momentum({...momentum}));
+            });
+          }
+        }
+      }
+    }
+    return thisChangedIds;
+  };
+  return { update };
+};