How can I detect when any of my cubes collide?
Blitz3D Forums/Blitz3D Beginners Area/How can I detect when any of my cubes collide?
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| I need to be able to move any cube and have it stop when it collides with another cube. I want to be able to press the space bar along with an arrow key to allow a cube to pass over another. Here is some sample code of what I have so far. To use it, you select a colored box to tell the program what "tool" you want to move. After selecting a tool, you can use the arrow keys to move the tool left and right. The up arrow increases the length of the tool. The down arrow decreases the length of the tool. I don't know how to make the cubes stop when they run into any other cube. I also need the collisions to be recognized after changing the size of any of the cubes or "tools". Hopefully, someone will understand what I am having trouble with and can offer some help. Thanks, David Here is some sample code so far...don't laugh at my novice coding. Graphics3D 1280,1024, 0, 2 SetBuffer BackBuffer() AppTitle "Z-Axis Simulation -- Uses 3DS files R=Rotate Part, C=Capture Screen, F=Flip Part, S=Show Set Screws, H=Hide Set Screws" camera=CreateCamera() PositionEntity camera,0,0,-50 CameraClsColor camera,255,255,255 MovementAmount# = 0.500 FingerToMove$ = "tl1" light=CreateLight() ;Let's drawing some tools now... tl1_Length# = 12.00 tl2_Length# = 2.00 tl3_Length# = 2.00 tl1=CreateCube() ScaleEntity tl1, tl1_Length#/2,.25,.001 EntityColor tl1, 255,0,0 TranslateEntity tl1, -6,0,.002 EntityType tl1, 1 tl2=CreateCube() ScaleEntity tl2, tl2_Length#/2,.25,.001 EntityColor tl2, 0,255,0 TranslateEntity tl2, -15,0,.002 EntityType tl2, 2 tl3=CreateCube() ScaleEntity tl3, tl3_Length#/2,.25,.001 EntityColor tl3, 0,0,255 TranslateEntity tl3, -24,0,.002 EntityType tl3, 3 While Not KeyDown( 1 ) Cls ScaleEntity tl1, tl1_Length#/2,.312,.001 ScaleEntity tl2, tl2_Length#/2,.312,.001 ScaleEntity tl3, tl3_Length#/2,.312,.001 If KeyDown(200) Or MouseDown(1) Then ;up ;Let's check to see if the user is pressing one of the direction buttons instead of the arrow keys... myerror% = 0 If MouseDown(1) Then If MouseX() > 770 And MouseX() < 820 Then If MouseY() > 930 And MouseY() < 955 Then myerror% = 0 Else myerror% = 1 End If Else myerror% = 1 End If End If If myerror% = 0 Then Select FingerToMove Case "tl1" tl1_Length# = tl1_Length# + MovementAmount# TranslateEntity tl1, - MovementAmount#/2,0,0 Case "tl2" tl2_Length# = tl2_Length# + MovementAmount# TranslateEntity tl2, - MovementAmount#/2,0,0 Case "tl3" tl3_Length# = tl3_Length# + MovementAmount# TranslateEntity tl3, - MovementAmount#/2,0,0 End Select End If End If If KeyDown(208) Or MouseDown(1) Then ;down ;Let's check to see if the user is pressing one of the direction buttons instead of the arrow keys... myerror% = 0 If MouseDown(1) Then If MouseX() > 770 And MouseX() < 820 Then If MouseY() > 990 And MouseY() < 1015 Then myerror% = 0 Else myerror% = 1 End If Else myerror% = 1 End If End If If myerror% = 0 Then Select FingerToMove Case "tl1" tl1_Length# = tl1_Length# - MovementAmount# TranslateEntity tl1, + MovementAmount#/2,0,0 Case "tl2" tl2_Length# = tl2_Length# - MovementAmount# TranslateEntity tl2, + MovementAmount#/2,0,0 Case "tl3" tl3_Length# = tl3_Length# - MovementAmount# TranslateEntity tl3, + MovementAmount#/2,0,0 End Select End If End If If KeyDown(203) Or MouseDown(1) Then ;left ;Let's check to see if the user is pressing one of the direction buttons instead of the arrow keys... myerror% = 0 If MouseDown(1) Then If MouseX() > 740 And MouseX() < 790 Then If MouseY() > 960 And MouseY() < 985 Then myerror% = 0 Else myerror% = 1 End If Else myerror% = 1 End If End If If myerror% = 0 Then Select FingerToMove Case "tl1" TranslateEntity tl1, -MovementAmount#,0,0 Case "tl2" TranslateEntity tl2, -MovementAmount#,0,0 Case "tl3" TranslateEntity tl3, -MovementAmount#,0,0 End Select End If End If If KeyDown(205) Or MouseDown(1) Then ;right ;Let's check to see if the user is pressing one of the direction buttons instead of the arrow keys... myerror% = 0 If MouseDown(1) Then If MouseX() > 800 And MouseX() < 850 Then If MouseY() > 960 And MouseY() < 985 Then myerror% = 0 Else myerror% = 1 End If Else myerror% = 1 End If End If If myerror% = 0 Then Select FingerToMove Case "tl1" TranslateEntity tl1, MovementAmount#,0,0 Case "tl2" TranslateEntity tl2, MovementAmount#,0,0 Case "tl3" TranslateEntity tl3, MovementAmount#,0,0 End Select End If End If If MouseDown(1) Then If MouseX() > 10 And MouseX() < 35 Then ;tl1 If MouseY() > 570 And MouseY() < 595 Then FingerToMove = "tl1" End If End If If MouseX() > 10 And MouseX() < 35 Then If MouseY() > 600 And MouseY() < 625 Then FingerToMove = "tl2" End If End If If MouseX() > 10 And MouseX() < 35 Then If MouseY() > 630 And MouseY() < 655 Then FingerToMove = "tl3" End If End If End If UpdateWorld ;Here is where I am trying to detect collisions between any "tools" For C% = 1 To 3 For D% = 1 To 3 Collisions C%,D%,2,1 Next Next ;This is so the user can press the spacebar to allow a "tool" to pass over another "tool" If KeyDown(57) Then ClearCollisions End If RenderWorld ;Let's print some column headings for the tooling information... Text 10,555, "TL#" Text 45,555, "LENGTH" Text 120,555, "LOCATION" ;Let's draw the rectangles for the tool numbers... Color 255,0,0 ;tl1 Rect 10,570,25,25,1 Color 0,0,0 Text 45,575, tl1_Length# ;Length Text 120,575, EntityX#(tl1) + tl1_Length#/2 Color 0,255,0 ;tl2 Rect 10,600,25,25,1 Color 0,0,0 Text 45,605, tl2_Length# ;Length Text 120,605, EntityX#(tl2) + tl2_Length#/2 Color 0,0,255 ;tl3 Rect 10,630,25,25,1 Color 0,0,0 Text 45,635, tl3_Length# ;Length Text 120,635, EntityX#(tl3) + tl3_Length#/2 ;Let's draw some movement buttons now... Color 0,0,0 Rect 740,960,50,25,0 Text 747, 966, "LEFT" Color 0,0,0 Rect 800,960,50,25,0 Text 807, 966, "RIGHT" Color 0,0,0 Rect 770,930,50,25,0 Text 785, 936, "UP" Color 0,0,0 Rect 770,990,50,25,0 Text 777, 996, "DOWN" Flip Wend End |
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| I found a couple of typos in my code and corrected the version above. It now almost works but does not work after changing the size of my cubes or "tools". Before changing the length of the cubes, the collision checking seems to work. Any ideas? |
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| Nevermind, I figured it out... or at least a way to make it work. Each time I change the length of the cube or "tool", I calculate and set the entityradius. Also, I changed from collision mode 2 to collision mode 1. Thanks, David |
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| Glad you got it sorted. Just noticed your post! |
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