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optimizing drawing speed and fixing #16

This commit is contained in:
Micho 2013-05-22 23:09:52 +02:00
parent 26235fa3d1
commit 9df7d9d129
1 changed files with 61 additions and 1 deletions
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62
clients/anim/main.js
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@ -475,6 +475,66 @@ function updatePosition() {
function renderCanvas() {
context.clearRect(0, 0, width, height);
var drawLists = [[],[],[],[]];
clients.forEach(function (client) {
if (client.valid) {
var dx = client.x - client.xo;
var dy = client.y - client.yo;
var r = Math.sqrt(dx*dx + dy*dy);
var f = (selectedCount > 0) ? (client.selected ? 1.3 : 0.4) : 1;
if ((r > 1) && (!client.settled)) {
if (client.selected) {
drawLists[0].push(client);
} else {
drawLists[1].push(client);
}
} else {
if (client.selected) {
drawLists[2].push(client);
} else {
drawLists[3].push(client);
}
}
}
});
context.strokeStyle = 'rgba(238,80,0,0.3)';
context.lineWidth = 2*radius;
context.beginPath();
drawLists[0].forEach(function (client) {
context.moveTo(client.xo, client.yo);
context.lineTo(client.x, client.y );
})
context.stroke();
var a = (selectedCount > 0) ? 0.1 : 0.2;
context.strokeStyle = 'rgba(0,0,0,'+a+')';
context.lineWidth = 2*radius*((selectedCount > 0) ? 0.4 : 1);
context.beginPath();
drawLists[1].forEach(function (client) {
context.moveTo(client.xo, client.yo);
context.lineTo(client.x, client.y );
})
context.stroke();
context.fillStyle = 'rgb(238,80,0)';
drawLists[2].forEach(function (client) {
context.beginPath();
context.arc(client.x, client.y, radius*1.3, 0, 2*Math.PI, false);
context.fill();
});
var r = (selectedCount > 0) ? 0.4 : 1;
context.fillStyle = 'rgb(0,0,0)';
drawLists[3].forEach(function (client) {
context.beginPath();
context.arc(client.x, client.y, radius*r, 0, 2*Math.PI, false);
context.fill();
})
/*
clients.forEach(function (client) {
if (client.valid) {
var dx = client.x - client.xo;
@ -488,7 +548,6 @@ function renderCanvas() {
context.strokeStyle = (client.selected) ? 'rgba(238,80,0,'+a+')' : 'rgba(0,0,0,'+a+')';
context.lineWidth = client.r*2*radius*f;
context.lineCap = 'round';
context.beginPath();
context.moveTo(client.xo, client.yo);
context.lineTo(client.x, client.y );
@ -502,6 +561,7 @@ function renderCanvas() {
}
}
});
*/
if (mapDrag) {
var x = Math.min(mouseDragX0, mouseDragX);