misc/tower
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Plausible parabolas

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This commit is contained in:
Ian Gulliver
2021-05-12 03:54:32 +00:00
parent 00f0456fb8
commit a1fea04b14
6 changed files with 46 additions and 19 deletions
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27
ts/projectile_tile_factory.ts
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@@ -3,6 +3,10 @@ import { LayeredTileFactory } from './layered_tile_factory.js';
import { Tile } from './tile.js';
import { TileFactory } from './tile_factory.js';
function get_distance(x: number, y: number) {
return Math.sqrt(x ** 2 + y ** 2);
}
export class ProjectileTileFactory extends TileFactory {
source_tile_factory: AnimatableTileFactory;
target_relative_x: number;
@@ -24,7 +28,18 @@ export class ProjectileTileFactory extends TileFactory {
this.loft = loft;
const copy = tile_factory.copy();
const distance = Math.sqrt(target_relative_x ** 2 + target_relative_y ** 2);
const top = Math.min(0, target_relative_y) - loft;
let h1_distance = get_distance(target_relative_x / 2, top);
let h2_distance = get_distance(target_relative_x / 2, target_relative_y - top);
let total_distance = h1_distance + h2_distance;
let vertex_offset = h1_distance / total_distance;
for (let i = 0; i < 5; i++) {
h1_distance = get_distance(target_relative_x * vertex_offset, top);
h2_distance = get_distance(target_relative_x * (1 - vertex_offset), target_relative_y - top);
total_distance = h1_distance + h2_distance;
vertex_offset = h1_distance / total_distance;
}
copy.add_animation(
'launch-x',
@@ -38,11 +53,11 @@ export class ProjectileTileFactory extends TileFactory {
{
'offset': 1.0,
'left': `${target_relative_x / tile_factory.width * 100}%`,
'transform': `rotate(${Math.sign(target_relative_x) * distance * spin * 10}deg)`,
'transform': `rotate(${Math.sign(target_relative_x) * total_distance * spin * 10}deg)`,
},
],
{
'duration': distance / speed * 100,
'duration': total_distance / speed * 100,
'iterations': 1,
},
);
@@ -56,9 +71,9 @@ export class ProjectileTileFactory extends TileFactory {
'top': '0',
},
{
'offset': 0.50 - Math.abs(target_relative_y / distance * 0.50),
'offset': vertex_offset,
'easing': 'cubic-bezier(0.33, 0.00, 0.66, 0.33)',
'top': `${((-1 * loft / tile_factory.height) + ((target_relative_y / distance) * (loft / tile_factory.height))) * 100}%`,
'top': `${top / tile_factory.height * 100}%`,
},
{
'offset': 1.0,
@@ -66,7 +81,7 @@ export class ProjectileTileFactory extends TileFactory {
},
],
{
'duration': distance / speed * 100,
'duration': total_distance / speed * 100,
'iterations': 1,
},
);

4
ts/tower.ts
View File

@@ -86,10 +86,10 @@ export function main() {
return Math.random() * (max - min) + min;
}
const tower = grid.add_tile(tiles.TOWER_FIREBALL1, 30, 18);
const tower = grid.add_tile(tiles.TOWER_FIREBALL1, 30, 28);
setInterval(() => {
tower.play('fire');
grid.add_tile(new ProjectileTileFactory(tiles.FIREBALL, rand(-20, 20), rand(-10, 20), 5, 1.5, 10), 31, 17);
grid.add_tile(new ProjectileTileFactory(tiles.FIREBALL, rand(-20, 20), rand(-10, 20), 5, 1.5, 5), 31, 27);
}, 3250);
};