Rotation #6
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Rotation #6
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samedii
approved these changes
Jan 26, 2024
| // First, undo scaling | ||
| let unscaledX = x / d.scale; | ||
| // Then, undo rotation | ||
| const rotatedX = |
| const translatedY = d.y; // y-coordinate remains the same for calculating x | ||
| // Apply rotation | ||
| const rotatedX = | ||
| Math.cos(d.rotation.angle) * (translatedX - d.rotation.x) - |
Contributor
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Math.cos/sin is kinda slow (I'm guessing they don't have a shortcut for PI). But I think it's ok as long as we have much less then 30k objects to render
| // Save the current context state | ||
| _context.save(); | ||
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| // Move to where the image will be drawn and apply rotation |
Contributor
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same here _context.translate + _context.rotate is more then enough
| // Move to the center of the rectangle | ||
| _context.translate(s.x(centerX), s.y(centerY)); | ||
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| // Rotate the context |
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the comment is actually wrong, chatgpt ... :P
| isDefined(maxWidth) ? s.distance(maxWidth) : undefined | ||
| 0, | ||
| 0, | ||
| maxWidth !== undefined ? s.distance(maxWidth) : undefined |
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was this on purpose or just chatgpt?
fippli
reviewed
Jan 29, 2024
| canvas, | ||
| { x = 0, y = 0, scale = 1, rotation = { x: 0, y: 0, angle: 0 } } = {} | ||
| ) => { | ||
| if (![0, Math.PI].includes(rotation.angle)) { |
Contributor
|
Frontend is not using canvas anymore. We will not be spending more time on this :) |
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Some credit goes to me and @samedii and a lot of credit goes to @chatgpt