Ad5001/LogarithmPlotter
Ad5001/LogarithmPlotter
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Taking edge cases into account into new drawing system.
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This commit is contained in:
Adsooi 2023-10-08 17:22:21 +02:00
parent 7408520819
commit 999999832a
Signed by: Ad5001
GPG key ID: EF45F9C6AFE20160
1 changed files with 8 additions and 2 deletions
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10
LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/objs/function.js
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@ -147,8 +147,12 @@ class Function extends Common.ExecutableObject {
ctx.fillRect(canvas.x2px(previousX)-1, canvas.y2px(previousY)-5, 2, 10)
}
} else {
// Use max precision if function is trigonometrical on log scale.
let exprString = expr.expr
if(exprString.includes("sin") || exprString.includes("cos") || exprString.includes("tan"))
pxprecision = (canvas.logscalex || exprString.includes("tan")) ? 1 : 3
// Calculate the previousY at the start of the canvas
if(definitionDomain.includes(previousX))
// PreviousY at the start of the canvas
previousY = expr.execute(previousX)
for(let px = pxprecision; px < canvas.canvasSize.width; px += pxprecision) {
let currentX = canvas.px2x(px)
@ -171,10 +175,12 @@ class Function extends Common.ExecutableObject {
currentX = canvas.px2x(tmpPx)
} while(!definitionDomain.includes(currentX) && currentX != previousX)
}
// This max variation is needed for functions with asymptotical vertical lines (e.g. 1/x, tan x...)
let maxvariation = (canvas.px2y(0)-canvas.px2y(canvas.canvasSize.height))
if(definitionDomain.includes(previousX) && definitionDomain.includes(currentX)) {
let currentY = expr.execute(currentX)
if(destinationDomain.includes(currentY)) {
if(previousY != null && destinationDomain.includes(previousY)) {
if(previousY != null && destinationDomain.includes(previousY) && Math.abs(previousY-currentY) < maxvariation) {
canvas.drawLine(ctx, canvas.x2px(previousX), canvas.y2px(previousY), canvas.x2px(currentX), canvas.y2px(currentY))
}
}