How to 3D cube?

Development
1

Hi,

I am new here.
I have a game idea I wish to develop but very new to cpp/arduboy development.

I wish to create a 3D cube which can be controlled by the dpad to rotate it around.

How would I go about this? Any pointers will be really helpful.

2

When you say ‘3D cube’ do you mean like a Rubik’s cube? That would be cool.

3

No, not rubik’s.
Just a solid cube.

4

Does this help > Add gravity to an animated graphic

1 Like
5

Yes, that does help somewhat.
However, I am having a slight difficulty in controlling the spin.
Basically, I wish to spin the cube by 90 degrees based on the dpad button.

Any idea how would I be doing that?

6

Check if the right/left button is pressed and if it is, increase/decrease the angle (SpinAng). But rotating it by 90 degrees will result in the same picture if the sides are the same, you’ll see no change.

7

Like @drummyfish says, make the SpinAng change when the dpad is pressed.

E.g. Something like:

void updateCube()
{
	// Increase velocity
	velocityY += 0.01f;

	// Update position
	positionX += velocityX;
	positionY += velocityY;

	if(arduboy.pressed(LEFT_BUTTON))
		if(iteration > 0)
			--iteration;

	if(arduboy.pressed(RIGHT_BUTTON))
		if(iteration < 60)
			++iteration;
}

(If you don’t need the falling/gravity, strip that part out and just draw the cube where you need it.)

8

For the 3d part, you just need some trigonometry. In this case just create the cube segment lines in a x y z vector struct and use How to calculate x and y coordinates of a rotated 3D cube in JavaScript? - Stack Overflow and change the angle in those formulas to rotate.

9

Sorry I don’t know where the code of this any more:

But see also the far more advanced: