62 lines
1.2 KiB
JavaScript
62 lines
1.2 KiB
JavaScript
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class PixelTimeRange
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{
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constructor(start_us, span_us, span_px)
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{
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this.Span_px = span_px;
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this.Set(start_us, span_us);
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}
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Set(start_us, span_us)
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{
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this.Start_us = start_us;
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this.Span_us = span_us;
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this.End_us = this.Start_us + span_us;
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this.usPerPixel = this.Span_px / this.Span_us;
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}
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SetStart(start_us)
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{
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this.Start_us = start_us;
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this.End_us = start_us + this.Span_us;
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}
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SetEnd(end_us)
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{
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this.End_us = end_us;
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this.Start_us = end_us - this.Span_us;
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}
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SetPixelSpan(span_px)
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{
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this.Span_px = span_px;
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this.usPerPixel = this.Span_px / this.Span_us;
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}
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PixelOffset(time_us)
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{
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return Math.floor((time_us - this.Start_us) * this.usPerPixel);
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}
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PixelSize(time_us)
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{
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return Math.floor(time_us * this.usPerPixel);
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}
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TimeAtPosition(position)
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{
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return this.Start_us + position / this.usPerPixel;
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}
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Clone()
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{
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return new PixelTimeRange(this.Start_us, this.Span_us, this.Span_px);
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}
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SetAsUniform(gl, program)
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{
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glSetUniform(gl, program, "inTimeRange.msStart", this.Start_us / 1000.0);
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glSetUniform(gl, program, "inTimeRange.msPerPixel", this.usPerPixel * 1000.0);
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}
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}
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