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Making AI able to 'see' the player

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Andrew Kesterson
2014-06-14 14:54:33 -07:00
parent 102366e3ac
commit e927396fd7
1 changed files with 65 additions and 64 deletions
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117
moonlight/js/moonlight-skulk.js
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@@ -599,76 +599,77 @@ var AISprite = function(game, x, y, key, frame) {
yd = -(yd); yd = -(yd);
var hyp = Math.sqrt(Number(xd * xd) + Number(yd * yd)); var hyp = Math.sqrt(Number(xd * xd) + Number(yd * yd));
if ( hyp < this.view_distance ) { if ( hyp > this.view_distance ) {
// View cone intersection test return false;
var p1 = new Phaser.Point(this.x + (this.body.width / 2), }
// View cone intersection test
var p1 = new Phaser.Point(this.x + (this.body.width / 2),
this.y); this.y);
var viewline = new Phaser.Line(this.x + (this.body.width / 2), var viewline = new Phaser.Line(this.x + (this.body.width / 2),
this.y, this.y,
this.x + (this.body.width / 2), this.x + (this.body.width / 2),
this.y - this.view_distance ); this.y - this.view_distance );
var p2 = new Phaser.Point(viewline.end.x, viewline.end.y); var p2 = new Phaser.Point(viewline.end.x, viewline.end.y);
p2.rotate(p1.x, p1.y, -45, true); p2.rotate(p1.x, p1.y, -45, true);
var p3 = new Phaser.Point(viewline.end.x, viewline.end.y); var p3 = new Phaser.Point(viewline.end.x, viewline.end.y);
var p4 = new Phaser.Point(viewline.end.x, viewline.end.y); var p4 = new Phaser.Point(viewline.end.x, viewline.end.y);
p4.rotate(p1.x, p1.y, 45, true); p4.rotate(p1.x, p1.y, 45, true);
/* /*
* ... In case this isn't obvious, this is the sprite's view cone: * ... In case this isn't obvious, this is the sprite's view cone:
* *
* p3 * p3
* p2 p4 * p2 p4
* \ / * \ /
* \ / * \ /
* \/ * \/
* p1 * p1
*/ */
if ( hasState(this, STATE_FACE_LEFT) ) { if ( hasState(this, STATE_FACE_LEFT) ) {
rotatePoints([p1, p2, p3, p4], rotatePoints([p1, p2, p3, p4],
this.x + (this.body.width / 2), this.x + (this.body.width / 2),
this.y + (this.body.height / 2), this.y + (this.body.height / 2),
-90); -90);
} else if ( hasState(this, STATE_FACE_RIGHT) ) { } else if ( hasState(this, STATE_FACE_RIGHT) ) {
rotatePoints([p1, p2, p3, p4], rotatePoints([p1, p2, p3, p4],
this.x + (this.body.width / 2), this.x + (this.body.width / 2),
this.y + (this.body.height / 2), this.y + (this.body.height / 2),
90); 90);
} else if ( hasState(this, STATE_FACE_DOWN) ) { } else if ( hasState(this, STATE_FACE_DOWN) ) {
rotatePoints([p1, p2, p3, p4], rotatePoints([p1, p2, p3, p4],
this.x + (this.body.width / 2), this.x + (this.body.width / 2),
this.y + (this.body.height / 2), this.y + (this.body.height / 2),
180); 180);
} }
var viewcone = new Phaser.Polygon(p1, p2, p3, p1); var viewcone = new Phaser.Polygon(p1, p2, p3, p1);
// FIXME : There has got to be a better way to do this // FIXME : There has got to be a better way to do this
var rectLines = [ var rectLines = [
new Phaser.Line(spr.body.left, spr.body.top, new Phaser.Line(spr.body.left, spr.body.top,
spr.body.right, spr.body.top), spr.body.right, spr.body.top),
new Phaser.Line(spr.body.right, spr.body.top, new Phaser.Line(spr.body.right, spr.body.top,
spr.body.right, spr.body.bottom), spr.body.right, spr.body.bottom),
new Phaser.Line(spr.body.right, spr.body.bottom, new Phaser.Line(spr.body.right, spr.body.bottom,
spr.body.left, spr.body.bottom), spr.body.left, spr.body.bottom),
new Phaser.Line(spr.body.left, spr.body.bottom, new Phaser.Line(spr.body.left, spr.body.bottom,
spr.body.left, spr.body.top) spr.body.left, spr.body.top)
]; ];
var withinView = false; var withinView = false;
rectLines.forEach(function(sl) { rectLines.forEach(function(sl) {
[[p1, p2], [p2, p3], [p3, p4], [p4, p1]].forEach(function(vl) { [[p1, p2], [p2, p3], [p3, p4], [p4, p1]].forEach(function(vl) {
tl = new Phaser.Line(vl[0].x, vl[0].y, tl = new Phaser.Line(vl[0].x, vl[0].y,
vl[1].x, vl[1].y); vl[1].x, vl[1].y);
if ( tl.intersects(sl) ) if ( tl.intersects(sl) )
return true;
}, this);
if ( viewcone.contains(sl.start.x, sl.start.y) )
return true; return true;
}, this); }, this);
if ( viewcone.contains(sl.start.x, sl.start.y) )
return true;
}, this);
return false; return false;
}
} }
this.enableWordBubble = function() { this.enableWordBubble = function() {