images.......
Blitz3D Forums/Blitz3D Beginners Area/images.......
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| I am making a simple game that has an image of a track and an image of a car, everything works except the car goes under the track image when I want it to go over the image. How do I solve this problem? -Thanks |
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| you have to draw the track before draw the car so the car will be on top of the track |
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| I hava tried that..... I have both the track and the car in the same while loop, the track doesn't move but the car does. And I have the buffer set as back buffer. It's like this: SetBuffer BackBuffer() While Not KeyHit(1) DrawImage track,0,0 Flip Cls If KeyDown(203) Then car_x=car_x-1*car_speed If KeyDown(205) Then car_x=car_x+1*car_speed If KeyDown(200) Then car_y=car_y-1*car_speed If KeyDown(208) Then car_y=car_y+1*car_speed If car_x>750 Then car_x=750 If car_x<0 Then car_x=0 If car_y>550 Then car_y=550 If car_y<0 Then car_y=0 If KeyDown(203) Then DrawImage car_west,car_x,car_y If KeyDown(205) Then DrawImage car_east,car_x,car_y If KeyDown(200) Then DrawImage car_north,car_x,car_y If KeyDown(208) Then DrawImage car_south,car_x,car_y Wend see a problem somewhere? |
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| in your code you draw the track then flip ten erase the screen then draw the car then in the next loop, draw the track on top of the car , flip , erase the screen you may just change where you're flip the screen and erase it SetBuffer BackBuffer() While Not KeyHit(1) DrawImage track,0,0 If KeyDown(203) Then car_x=car_x-1*car_speed If KeyDown(205) Then car_x=car_x+1*car_speed If KeyDown(200) Then car_y=car_y-1*car_speed If KeyDown(208) Then car_y=car_y+1*car_speed If car_x>750 Then car_x=750 If car_x<0 Then car_x=0 If car_y>550 Then car_y=550 If car_y<0 Then car_y=0 If KeyDown(203) Then DrawImage car_west,car_x,car_y If KeyDown(205) Then DrawImage car_east,car_x,car_y If KeyDown(200) Then DrawImage car_north,car_x,car_y If KeyDown(208) Then DrawImage car_south,car_x,car_y Flip Cls Wend hope it help and work (not tested but should work) |
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| Thanks, it worked. |
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| and below the same but a bit optimised hope you like :) you don't need to retest the keys to know what image of the car you have to draw. SetBuffer BackBuffer() While Not KeyHit(1) DrawImage track,0,0 If KeyDown(203) :car_x=car_x-1*car_speed:carframe=car_west:endif If KeyDown(205) :car_x=car_x+1*car_speed:carframe=car_east:endif If KeyDown(200) :car_y=car_y-1*car_speed:carframe=car_north:endif If KeyDown(208) :car_y=car_y+1*car_speed:carframe=car_south:endif If car_x>750 Then car_x=750 If car_x<0 Then car_x=0 If car_y>550 Then car_y=550 If car_y<0 Then car_y=0 DrawImage carframe,car_x,car_y Flip Cls Wend |
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| Problem..... The code above does not work. Memory Access Violation. Oh, and how do you make it so if two different keys were pressed, make it show an image? Because I have a North East, North West, South East and South West image of the car now that I want to put on. When you press the up cursor and left cursor at the same time I want it to show the North West image. |
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| Problem..... The code above does not work. Memory Access Violation. my bad, just add yjis line at the top of this part of the code carframe=car_north this give a default value to te carframe else when blitz goes on the drawimage command he can't found the image and do a memory access violation Oh, and how do you make it so if two different keys were pressed, make it show an image? Because I have a North East, North West, South East and South West image of the car now that I want to put on. When you press the up cursor and left cursor at the same time I want it to show the North West image. it's already in your question, use AND . :) If KeyDown(203) and keydown(200) :car_x=car_x-1*car_speed:car_y=car_y-1*car_speed:carframe=car_southwest:endif If KeyDown(205) and keydown(200) :car_x=car_x+1*car_speed:car_y=car_y-1*car_speed:carframe=car_southeast:endif If KeyDown(203) and keydown(208) :car_x=car_x-1*car_speed:car_y=car_y+1*car_speed:carframe=car_northwest:endif If KeyDown(205) and keydown(208) :car_x=car_x+1*car_speed:car_y=car_y+1*car_speed:carframe=car_northeast:endif note that your first code draw the car only if a key is pressed so if you don't move te car the car disapear of the screen |
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It's always good to put thewhile not keyhit(1) cls draw stuff flip wend cls at the top or just after the flip, and put the flip right at the end of the loop :D |
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| Everything works fine now except I can't think of a way to keep the image when no keys are pressed. Because when no keys are pressed it will automatically show the car_north image. :( I don't think this: DrawImage carframe,car_x,car_y works too well. :( Anyone have a way of solving this? |
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| it's probably because you put the carframe=car_north IN the loop you have to put the command OUTSIDE THE LOOP like below :) carframe=car_north SetBuffer BackBuffer() While Not KeyHit(1) DrawImage track,0,0 If KeyDown(203) :car_x=car_x-1*car_speed:carframe=car_west:endif If KeyDown(205) :car_x=car_x+1*car_speed:carframe=car_east:endif If KeyDown(200) :car_y=car_y-1*car_speed:carframe=car_north:endif If KeyDown(208) :car_y=car_y+1*car_speed:carframe=car_south:endif If KeyDown(203) and keydown(200) :car_x=car_x-1*car_speed:car_y=car_y-1*car_speed:carframe=car_southwest:endif If KeyDown(205) and keydown(200) :car_x=car_x+1*car_speed:car_y=car_y-1*car_speed:carframe=car_southeast:endif If KeyDown(203) and keydown(208) :car_x=car_x-1*car_speed:car_y=car_y+1*car_speed:carframe=car_northwest:endif If KeyDown(205) and keydown(208) :car_x=car_x+1*car_speed:car_y=car_y+1*car_speed:carframe=car_northeast:endif If car_x>750 Then car_x=750 If car_x<0 Then car_x=0 If car_y>550 Then car_y=550 If car_y<0 Then car_y=0 DrawImage carframe,car_x,car_y Flip Cls Wend it's a default value just usefull before any key was pressed to avoid the Memory Access Violation. error, after that the value will stay the last key you pressed... |
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| Thanks, I don't know if you can but is there any way you could make it so if a certain colour of an image overlaps another image it does something? Like say if the image of the car overlaps the green part of the track image? |
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