/ Tick marks along the positive Y-axis / Positive Y-axis of the graph is the canvas's negative Y-axis for(i=1; i(num lines x - x axis distance grid lines); i++) ctx.startPath(); ctx.lineWidth = 1; ctx.strokeStyle = "#000000" / Create a 6px long tick mark (-3 to 3) ctx.moveTo(-3, grid size*i+0.5); ctx.lineTo(3, grid size*i+0.5); At that moment, the text value is ctx.font = '9px Arial'; ctx.textAlign ='start'; ctx.fill = '9px Arial' Text(-y axis starting point.number*i + y axis starting point.suffix, 8, grid size*i+3); / Tick marks along the negative Y-axis / Negative Y-axis of graph is positive Y-axis of canvas for(i=1; ix axis distance grid lines; i++) ctx.beginPath(); ctx.lineWidth = 1; ctx.strokeStyle = "#000000"; / Create a 6px long tick mark (-3 to 3) ctx.moveTo(-3, -grid size*i+0.5); ctx.lineTo(3, -grid size*i+0.5); At that moment, the text value is ctx.font = 'Arial 9px'; ctx.textAlign ='start'; ctx.fillText(y axis starting point.number*i + y axis starting point.suffix, 8, -grid size*i+3); That's all. You may generate a graph of your choosing by altering the values of the grid lines and the beginning values of the tick markers.
On make the test more realistic, let's add some shadows and glare to the surface of the skull.
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I can draw the axes (x,y, and z) in the middle of the screen using openGL, but not their arrows at the end of each line. In 2D, I found an example code that used GL LINE STRIP, but in 3D, I searched a lot and couldn't find any; so I simply place a point at the end of each line; but it's really ugly. What is the best way for me to sketch it? This code just draws the cylinder of the z axis in the correct location; how can I set others?
