Press n or j to go to the next uncovered block, b, p or k for the previous block.
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export class SkPoint {
X: number;
Y: number;
constructor(
public x: number,
public y: number,
) {
this.X = x;
this.Y = y;
}
}
enum Direction {
Up,
Down,
Left,
Right,
}
export type ConnectedObjectInfo = {
position: SkPoint;
size: SkPoint;
rotation: number;
is_flipped: boolean;
};
export type ConnectionInfo = {
location: SkPoint;
direction: DirectionEnum;
};
function add(p1: SkPoint, p2: SkPoint): SkPoint {
return new SkPoint(p1.x + p2.x, p1.y + p2.y);
}
function multiply(p: SkPoint, p2: SkPoint): SkPoint {
return new SkPoint(p.x * p2.x, p.y * p2.y);
}
function getConDirection(end: SkPoint, notch: SkPoint) {
if (end.x == notch.x) {
return end.y > notch.y ? Direction.Up : Direction.Down;
}
return end.x > notch.x ? Direction.Left : Direction.Right;
}
type GetSegmentsProps = {
isVertical: boolean;
startConLocation: SkPoint;
endConLocation: SkPoint;
startNotchLocation: SkPoint;
endNotchLocation: SkPoint;
};
function getMidPoints(props: GetSegmentsProps): SkPoint[] {
const {
isVertical,
startConLocation,
endConLocation,
startNotchLocation,
endNotchLocation,
} = props;
let startPoint: SkPoint;
let endPoint: SkPoint;
const avgX = (a: SkPoint, b: SkPoint) => (a.x + b.x) / 2;
const avgY = (a: SkPoint, b: SkPoint) => (a.y + b.y) / 2;
const startConDirection = getConDirection(
startConLocation,
startNotchLocation,
);
const endConDirection = getConDirection(endConLocation, endNotchLocation);
if (isVertical) {
startPoint = new SkPoint(
avgX(startNotchLocation, endNotchLocation),
startNotchLocation.y,
);
endPoint = new SkPoint(
avgX(startNotchLocation, endNotchLocation),
endNotchLocation.y,
);
if (
startConDirection == Direction.Up ||
startConDirection == Direction.Down
) {
if (endConDirection == Direction.Left) {
startPoint.x = Math.min(
avgX(startNotchLocation, endNotchLocation),
endNotchLocation.x,
);
endPoint.x = Math.min(
avgX(startNotchLocation, endNotchLocation),
endNotchLocation.x,
);
} else if (endConDirection == Direction.Right) {
startPoint.x = Math.max(
avgX(startNotchLocation, endNotchLocation),
endNotchLocation.x,
);
endPoint.x = Math.max(
avgX(startNotchLocation, endNotchLocation),
endNotchLocation.x,
);
}
} else if (startConDirection == Direction.Left) {
startPoint.x = Math.min(
avgX(startNotchLocation, endNotchLocation),
startNotchLocation.x,
);
endPoint.x = Math.min(
avgX(startNotchLocation, endNotchLocation),
startNotchLocation.x,
);
if (endConDirection == Direction.Left) {
endPoint.x = Math.min(startNotchLocation.x, endNotchLocation.x);
startPoint.x = Math.min(startNotchLocation.x, endNotchLocation.x);
}
} else if (startConDirection == Direction.Right) {
startPoint.x = Math.max(
avgX(startNotchLocation, endNotchLocation),
startNotchLocation.x,
);
endPoint.x = Math.max(
avgX(startNotchLocation, endNotchLocation),
startNotchLocation.x,
);
if (endConDirection == Direction.Right) {
endPoint.x = Math.max(startNotchLocation.x, endNotchLocation.x);
startPoint.x = Math.max(startNotchLocation.x, endNotchLocation.x);
}
}
} else {
startPoint = new SkPoint(
startNotchLocation.x,
avgY(startNotchLocation, endNotchLocation),
);
endPoint = new SkPoint(
endNotchLocation.x,
avgY(startNotchLocation, endNotchLocation),
);
if (
startConDirection == Direction.Left ||
startConDirection == Direction.Right
) {
if (endConDirection == Direction.Up) {
startPoint.y = Math.min(
avgY(startNotchLocation, endNotchLocation),
endNotchLocation.y,
);
endPoint.y = Math.min(
avgY(startNotchLocation, endNotchLocation),
endNotchLocation.y,
);
} else if (endConDirection == Direction.Down) {
startPoint.y = Math.max(
avgY(startNotchLocation, endNotchLocation),
endNotchLocation.y,
);
endPoint.y = Math.max(
avgY(startNotchLocation, endNotchLocation),
endNotchLocation.y,
);
}
} else if (startConDirection == Direction.Up) {
startPoint.y = Math.min(
avgY(startNotchLocation, endNotchLocation),
startNotchLocation.y,
);
endPoint.y = Math.min(
avgY(startNotchLocation, endNotchLocation),
startNotchLocation.y,
);
if (endConDirection == Direction.Up) {
startPoint.y = Math.min(startNotchLocation.y, endNotchLocation.y);
endPoint.y = Math.min(startNotchLocation.y, endNotchLocation.y);
}
} else {
startPoint.y = Math.max(
avgY(startNotchLocation, endNotchLocation),
startNotchLocation.y,
);
endPoint.y = Math.max(
avgY(startNotchLocation, endNotchLocation),
startNotchLocation.y,
);
if (endConDirection == Direction.Down) {
startPoint.y = Math.max(startNotchLocation.y, endNotchLocation.y);
endPoint.y = Math.max(startNotchLocation.y, endNotchLocation.y);
}
}
}
return [startPoint, endPoint];
}
export function getUnitOpRotation(
startOp: ConnectedObjectInfo,
endOp: ConnectedObjectInfo,
) {
if (startOp.size.x === 100) {
return startOp;
}
if (endOp.size.x === 100) {
return endOp;
}
return endOp;
}
function checkVertical(
startNotchLocation: SkPoint,
endNotchLocation: SkPoint,
startOp: ConnectedObjectInfo,
endOp: ConnectedObjectInfo,
) {
const rotationUnitOp = getUnitOpRotation(startOp, endOp);
if (rotationUnitOp.rotation == 0) {
return rotationUnitOp.is_flipped
? Math.sign(startNotchLocation.x - endNotchLocation.x) === 1
: Math.sign(startNotchLocation.x - endNotchLocation.x) === -1;
} else if (rotationUnitOp.rotation == 90) {
return rotationUnitOp.is_flipped
? Math.sign(startNotchLocation.y - endNotchLocation.y) === -1
: Math.sign(startNotchLocation.y - endNotchLocation.y) === 1;
} else if (rotationUnitOp.rotation == 180) {
return rotationUnitOp.is_flipped
? Math.sign(startNotchLocation.x - endNotchLocation.x) === -1
: Math.sign(startNotchLocation.x - endNotchLocation.x) === 1;
}
return rotationUnitOp.is_flipped
? Math.sign(startNotchLocation.y - endNotchLocation.y) === 1
: Math.sign(startNotchLocation.y - endNotchLocation.y) === -1;
}
function rotate(p: SkPoint, rotation: number): SkPoint {
switch (rotation) {
case 0:
return p;
case 90:
return new SkPoint(-p.y, p.x);
case 180:
return new SkPoint(-p.x, -p.y);
case 270:
return new SkPoint(p.y, -p.x);
default:
throw new Error("Only 90, 180, and 270 degrees are supported.");
}
}
function flip(p: SkPoint, flipH: boolean, rotation: number): SkPoint {
if (flipH) {
switch (rotation) {
case 0:
case 180:
p.x = -p.x;
return p;
case 90:
case 270:
p.y = -p.y;
return p;
default:
throw new Error("Only 90, 180, and 270 degrees are supported.");
}
}
return p;
}
const half = new SkPoint(0.5, 0.5);
function convertToCenterRelative(point: SkPoint): SkPoint {
return new SkPoint((point.x - 0.5) * 2, (point.y - 0.5) * 2);
}
export function getConnectionLinePoints(
startOp: ConnectedObjectInfo,
startCon: ConnectionInfo,
endOp: ConnectedObjectInfo,
endCon: ConnectionInfo,
) {
const convertedStartConLocation = convertToCenterRelative(startCon.location);
const convertedEndConLocation = convertToCenterRelative(endCon.location);
const startOpSizeHalf = multiply(startOp.size, half);
const endOpSizeHalf = multiply(endOp.size, half);
const localStartLocation = multiply(
startOpSizeHalf,
convertedStartConLocation,
);
const localNotchStartLocation = add(localStartLocation, new SkPoint(10, 0));
const localEndLocation = multiply(endOpSizeHalf, convertedEndConLocation);
const localNotchEndLocation = add(localEndLocation, new SkPoint(-10, 0));
const rotatedStartLocation = rotate(localStartLocation, startOp.rotation);
const rotatedEndLocation = rotate(localEndLocation, endOp.rotation);
const rotatedNotchStartLocation = rotate(
localNotchStartLocation,
startOp.rotation,
);
const rotatedNotchEndLocation = rotate(localNotchEndLocation, endOp.rotation);
const flippedStartLocation = flip(
rotatedStartLocation,
startOp.is_flipped,
startOp.rotation,
);
const flippedEndLocation = flip(
rotatedEndLocation,
endOp.is_flipped,
startOp.rotation,
);
const flippedNotchStartLocation = flip(
rotatedNotchStartLocation,
startOp.is_flipped,
startOp.rotation,
);
const flippedNotchEndLocation = flip(
rotatedNotchEndLocation,
endOp.is_flipped,
startOp.rotation,
);
const startConLocation = add(
startOp.position,
add(flippedStartLocation, startOpSizeHalf),
);
const startNotchLocation = add(
startOp.position,
add(flippedNotchStartLocation, startOpSizeHalf),
);
const endConLocation = add(
endOp.position,
add(flippedEndLocation, endOpSizeHalf),
);
const endNotchLocation = add(
endOp.position,
add(flippedNotchEndLocation, endOpSizeHalf),
);
const isVertical = checkVertical(
startNotchLocation,
endNotchLocation,
startOp,
endOp,
);
const midPoints = getMidPoints({
isVertical,
startConLocation,
endConLocation,
startNotchLocation,
endNotchLocation,
});
return {
points: [startConLocation, startNotchLocation]
.concat(midPoints)
.concat([endNotchLocation, endConLocation]),
isVertical,
};
}
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