1. The “rotate” function can be removed as it is not being used.
2. The “project” function can be modified to only project the X and Y coordinates of the point, removing the “Z” coordinate.
3. The grid array can be modified to contain objects with only X and Y properties instead of X, Y, and Z.
4. The “drawLine” function should remain as it is, as it only handles drawing lines.

Renaming the title to “schematoid” can be done by modifying the content inside the &lt;title&gt; HTML tag.

Adding a unit conversion method is not necessary at the moment, but it can be added in the future if needed.

The code also includes event listeners for mouse interaction, allowing users to draw lines and points on the canvas based on the grid.

Overall, the code creates a dynamic and interactive 2D schematics drawing tool with a customizable grid. Further improvements or integrations can be made based on specific requirements or interesting ideas.
if you have any interesting ideas you can integrate or tell me about them.
Here are some ideas you can consider integrating into the schematics drawer:

1. Zoom and Pan Functionality: Implement zoom in and out functionality to allow users to zoom in or out on the canvas. Also, enable panning so users can navigate across the canvas.

2. Shape Drawing: Include the ability to draw various shapes such as rectangles, circles, and polygons. Users can select the shape they want to draw and then click on the canvas to create the shape.

3. Text Annotation: Allow users to add text annotations to the canvas. They can click on the canvas and input text that will be displayed in the specified location.

4. Save and Load Drawings: Implement functionality to save the current drawing to a file or database so that users can load it later. This can be useful for saving and sharing schematics.

5. Grid Customization: Add options to customize the grid appearance, such as colors, line styles, and transparency.

6. Snap-to-grid Functionality: Enhance the snapable grid feature to make sure that lines and shapes snap to the grid when being drawn or moved.

7. Measurement Tools: Include tools that allow users to measure distances between points or objects on the canvas. This can be useful for accurately designing and dimensioning schematics.

8. Layers: Add support for layers to organize different elements of the drawing. Users can create multiple layers and assign different elements to different layers, making it easier to manage complex drawings.

Remember to prioritize the features based on your specific requirements and the needs of your users.
expandable Measurement Tool that shows delta in snapping points between grid’s start-end snapping points. so, the idea is to make this tool always active on canvas when you hover over snapping point, click on starting point, and from this position this tool expanding until you press end point on grid.
That’s an interesting idea! Here’s how you can integrate an expandable measurement tool into the schematics drawer:

1. Define a new variable, let’s call it measurementActive, which will track whether the measurement tool is active or not. Set its initial value to false.

2. Create two more variables, startPoint and endPoint, to store the clicked start and end points for the measurement. Set their initial values to null.

3. Modify the findClosestPoint function to check if the measurement tool is active. If it is active and a point is found, update the endPoint variable with the found point.


function findClosestPoint(point) {
  // Rest of the code…

  if (measurementActive && minIndex !== -1) {
    endPoint = grid[minIndex];
  }

  // Rest of the code…
}



4. Add an event listener to the canvas for the mousemove event. Inside the event listener, check if the measurement tool is active. If it is, redraw the canvas and draw a line from the startPoint to the current mouse position.


canvas.addEventListener(‘mousemove’, (e) => {
  if (measurementActive && startPoint !== null) {
    const canvasRect = canvas.getBoundingClientRect();
    const mouseX = e.clientX - canvasRect.left;
    const mouseY = e.clientY - canvasRect.top;
    
    ctx.clearRect(0, 0, canvas.width, canvas.height);
    draw();
    drawLine([startPoint, { x: mouseX, y: mouseY }]);
  }
});



5. Modify the mousedown event listener to handle the start and end points for the measurement tool. If the measurement tool is not active, check if the clicked point is a valid snapping point. If it is, set the startPoint and endPoint variables, and set measurementActive to true. If the measurement tool is already active and the clicked point is a valid snapping point, set the endPoint variable and draw the final line.


canvas.addEventListener(‘mousedown’, (e) => {
  if (!measurementActive) {
    // Rest of the code…
    
    if (clickedPoint !== null) {
      startPoint = clickedPoint;
      measurementActive = true;
    }
    
    // Rest of the code…
  } else {
    if (clickedPoint !== null) {
      endPoint = clickedPoint;
      lines.push([startPoint, endPoint]);
      startPoint = null;
      endPoint = null;
      measurementActive = false;
    }
  }
});



6. Finally, add a conditional check inside the draw() function to draw the active measurement line.


function draw() {
  // Rest of the code…

  if (measurementActive && startPoint !== null && endPoint !== null) {
    drawLine([startPoint, endPoint]);
  }
  
  // Rest of the code…
}



With these modifications, the measurement tool will become active when you click on a snapping point. It will continuously update and display a line from the start point to the current mouse position, and the line will become final when you click on another snapping point.
not sure if this’s correct method to make a measurement guidance tool. need to invent some shortcut system here, without shortcuts you will be unable to make any properre scientific instrument. for example, if you want to measure distance in points between multiple points in overall grid matrix, you can temporarly press ctrl plus left mouse click and measure all you need until you unhold ctrl. also, when you are using this measurement method through ctrl shorcut, the actual line shouldn’t be drawn on grid, only measurement action.
I apologize for the confusion. I misunderstood your requirements earlier. Here’s an updated approach for implementing a measurement guidance tool with the specified functionality:

1. Remove the measurementActive variable as we’ll handle the measurement action through a keyboard shortcut.

2. Add a variable called measurementMode and set its initial value to false. This variable will track whether the measurement mode is active or not.

3. Modify the mousedown event listener to handle the measurement action. If the Ctrl key is pressed while the left mouse button is clicked, toggle the measurementMode. If the measurementMode is active, store the start point, and if it’s inactive, clear the start point and redraw the canvas.


let startPoint = null;

canvas.addEventListener(‘mousedown’, (e) => {
  if (e.ctrlKey) {
    measurementMode = !measurementMode;
    
    if (measurementMode) {
      const canvasRect = canvas.getBoundingClientRect();
      const mouseX = e.clientX - canvasRect.left;
      const mouseY = e.clientY - canvasRect.top;
      startPoint = findClosestPoint({ x: mouseX, y: mouseY });
    } else {
      startPoint = null;
      ctx.clearRect(0, 0, canvas.width, canvas.height);
      draw();
   

no, don’t show any codes here, just discuss. need to place that distance inbetween grid points value in total points to some user interface near grid adjustment values, because showing this on grid itself will block points. yeah.