46 lines
887 B
JavaScript
46 lines
887 B
JavaScript
// računa približevanje ter računa/popravlja odmike videa
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class Zoom {
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// internal variables
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// functions
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constructor() {
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this.scale = 1;
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this.scaleStep = 1.2;
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this.minScale = 0.5; // not accurate, actually slightly less
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this.maxScale = 8; // not accurate, actually slightly more
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}
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reset(){
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this.scale = 1;
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}
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zoomIn(){
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if(this.scale >= this.maxScale)
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return;
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this.scale *= this.scaleStep;
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}
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zoomOut(){
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if(this.scale <= this.minScale)
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return;
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this.scale *= (1/this.scaleStep);
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}
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setZoom(scale){
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if(scale < this.minScale) {
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this.scale = this.minScale;
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} else if (scale > this.maxScale) {
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this.scale = this.maxScale;
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} else {
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this.scale = scale;
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}
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}
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applyZoom(videoDimensions){
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videoDimensions.width *= this.scale;
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videoDimensions.height *= this.scale;
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}
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} |