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30shooter
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avoid shoots and corners

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master
neingeist 13 years ago
parent d32c488412
commit c627927e38
1 changed files with 27 additions and 4 deletions
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25
herzle.js
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@ -134,6 +134,10 @@ function lerp(t, a, b) {
return (a + t*(b-a));
}
function dist(a, b) {
return (b[1] - a[1]) / (b[0] - a[0]);
}
var a = 0;
function animate() {
@ -164,11 +168,30 @@ function animate() {
new_enemy_pos[0] += off;
var off = min + parseInt(Math.random() * (max-min));
new_enemy_pos[1] += off;
}
// avoid shoots
for(var i = 0; i < shoots.length; i++) {
if (shoots[i]) {
if (dist(enemy_pos, shoots[i]) < 100) {
new_enemy_pos[0] = lerp(-0.50, enemy_pos[0], shoots[i][0]);
new_enemy_pos[1] = lerp(-0.35, enemy_pos[1], shoots[i][1]);
}
}
}
// avoid corners
if (new_enemy_pos[0] < 0.05 * window.innerWidth || new_enemy_pos[0] > 0.95 * window.innerWidth) {
new_enemy_pos[0] = lerp(0.2, enemy_pos[0], 0.5 * window.innerWidth);
}
if (new_enemy_pos[1] < 0.05 * window.innerHeight || new_enemy_pos[1] > 0.95 * window.innerHeight) {
new_enemy_pos[1] = lerp(0.2, enemy_pos[1], 0.25 * window.innerHeight);
}
// stay inside!
if (new_enemy_pos[0] < 0) new_enemy_pos[0] = 0;
if (new_enemy_pos[0] > window.innerWidth) new_enemy_pos[0] = window.innerWidth;
if (new_enemy_pos[1] < 0.05 * window.innerHeight) new_enemy_pos[1] = 0.05 * window.innerHeight;
if (new_enemy_pos[1] > 0.5 * window.innerHeight) new_enemy_pos[0] = 0.5 * window.innerHeight;
}
// slowly move to desired position
enemy_pos[0] = lerp(0.15, enemy_pos[0], new_enemy_pos[0]);
enemy_pos[1] = lerp(0.15, enemy_pos[1], new_enemy_pos[1]);