I'm in the midst of grasping all of the pixel movement system included in BYONDs new system. I was looking at the pixel demo and I was confused about using step x and y. If you alter step x and y (like in the demo to make the smilley face big), wouldnt you have to change the bound x and y of the atom as well?
ex. if the new step size causes an icon to fill a 32x32 area in the bottom left corner of a 64x64 grid (like in the demo), shouldnt the bound x and y be 0 since there are now no empty pixels to the left and bottom of the icon?
Can you elaborate or give another example regarding what step x ans step y do? I think I understand a little more though. Are you saying that step x and y dictate the position of the icon relative to the turf it is on?
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Raruno wrote:
Are you saying that step x and y dictate the position of the icon relative to the turf it is on? Yes. Normally, when setting a mob's loc to a coordinate, they are placed there and the bottom left corner of their bounding box is placed in the bottom left corner of the turf. Now assuming your bound_x and bound_y are set correctly, if you set a mob's loc to a coordinate and then set their step_x to 5 and their step_y to 10, their mob (bounding box, icon, everything) is shifted 5 pixels to the right and 10 pixels up. | |
How would you know when to set a step x and y
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You usually won't have to. They are set automatically whenever you move. You won't have to do anything with them unless you want to.
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ok thanks
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step_x and step_y are the pixel-perfect coordinates of the atom on the current turf. Setting a step_x of 16 on a mob will place it's bottom left corner 16 pixels into the current turf it is on.
bound_x and bound_y are the pixel-perfect positions of the atom's bounding box, which determine when it crosses something.
Say you have an icon of a 16x16 square centered inside of a 32x32 canvas. Setting a bound_width and bound_height of 16 won't place the bounding box over the square itself. To do that, you must set the bound_x and bound_y values to 8, which moves the bounding box's position on the atom 8 pixels to the right and 8 pixels up, respectively.
If any more clarification is needed, please ask.
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