What is wrong here?

Blitz3D Forums/Blitz3D Programming/What is wrong here?

EpicElrod (Posted 2015) [#1]

Every time I compile my code it says "Memory Access Violation" ;-------------------------------------------------------------------- ;The Flesh ;By Elijah Dement ;Started: June 27, 2015 ;A first-Person Horror game ;Hobo Development Studios ;-------------------------------------------------------------------- ;The name AppTitle "The Flesh" ;Auto-detect the resolution desk_w=GetSystemMetrics(0) desk_h=GetSystemMetrics(1) Graphics3D desk_w,desk_h,32,2 ;Include the Health and Death function Include "health.bb" ;Include the save system Include "saving.bb" user = CreateCamera() ; == Functions == Function MouseLook() ; -- Update the smoothing que to smooth the movement of the mouse. mouse_x_speed_5# = mouse_x_speed_4# mouse_x_speed_4# = mouse_x_speed_3# mouse_x_speed_3# = mouse_x_speed_2# mouse_x_speed_2# = mouse_x_speed_1# mouse_x_speed_1# = MouseXSpeed ( ) mouse_y_speed_5# = mouse_y_speed_4# mouse_y_speed_4# = mouse_y_speed_3# mouse_y_speed_3# = mouse_y_speed_2# mouse_y_speed_2# = mouse_y_speed_1# mouse_y_speed_1# = MouseYSpeed ( ) the_yaw# = ( ( mouse_x_speed_1# + mouse_x_speed_2# + mouse_x_speed_3# + mouse_x_speed_4# + mouse_x_speed_5# ) / 5.0 ) * mouselook_x_inc# the_pitch# = ( ( mouse_y_speed_1# + mouse_y_speed_2# + mouse_y_speed_3# + mouse_y_speed_4# + mouse_y_speed_5# ) / 5.0 ) * mouselook_y_inc# ;^^^^^^ TurnEntity user, 0.0, -the_yaw#, 0.0 ; Turn the user on the Y (yaw) axis. user_camera_pitch# = user_camera_pitch# + the_pitch# ; -- Limit the user's camera to within 180 degrees of pitch rotation. 'EntityPitch()' returns useless values so we need to use a variable to keep track of the camera pitch. If user_camera_pitch# > 90.0 Then user_camera_pitch# = 90.0 If user_camera_pitch# < -90.0 Then user_camera_pitch# = -90.0 ;^^^^^^ RotateEntity user_camera, user_camera_pitch#, 0.0, 0.0 ; Pitch the user's camera up and down. ; -- Limit the mouse's movement. Using this method produces smoother mouselook movement than centering the mouse each loop. If ( MouseX() > mouse_right_limit ) Or ( MouseX() < mouse_left_limit ) Or ( MouseY() > mouse_bottom_limit ) Or ( MouseY() < mouse_top_limit ) MoveMouse viewport_center_x, viewport_center_y EndIf ;^^^^^^ End Function Function MoveUser() If KeyDown( 32 ) Or KeyDown( 205 ) Or KeyDown(52) ; Right. The 'D' and 'CURSOR RIGHT' keys. x#= 4.0 Else If KeyDown( 30 ) Or KeyDown( 203 ) Or KeyDown(51); Left. The 'A' and 'CURSOR LEFT' keys. x#=-4.0 EndIf If KeyDown( 17 ) Or KeyDown( 200 ) Or MouseDown(2); Forward. The 'W' and 'CURSOR UP' keys. z#= 4.0 Else If KeyDown( 31 ) Or KeyDown( 208 ) Or KeyDown(53); Backward. The 'S' and 'CURSOR DOWN' keys. z#=-4.0 EndIf If KeyDown( 44 ) And KeyDown( 17 ) z#= 7.0 ; Sprint. "Lshift" and "W" keys MoveEntity user, x# * user_movement_speed# * Delta_Time#, y# * user_movement_speed# * Delta_Time#, z# * user_movement_speed# * Delta_Time# ; Move the user. End Function ; == Game Loop == While Not KeyDown( 1 ) Moveuser() Mouselook() RenderWorld UpdateWorld Flip Wend End ; == End Loop ==

steve_ancell (Posted 2015) [#2]

Have you tried running in debug mode?, that may give you more of a lead to follow.

steve_ancell (Posted 2015) [#3]

Also try making your user variable global.

Zethrax (Posted 2015) [#4]

Make sure you have debug mode turned on ('Main menu > Program > Debug enabled') to get useful debugging info. Also try inserting the 'Stop' command at various point in the code to try to drill down to where the problem is occurring. Try adding some debugging code to return the values stored in the variables used to hold entity handles. Chances are the problem is caused by supplying a zero value as an entity handle because the variable hasn't yet been assigned the value of the handle. Looks like some of my old code from the code archives. Good to see it getting put to use. Although seeing 'the_yaw#' and 'the_pitch#' in there reminds me of how dodgy some of my early coding conventions were. I updated that FPS code archive code a while back too, so it might be worth your checking out the new code: http://www.blitzbasic.com/codearcs/codearcs.php?code=1137

_PJ_ (Posted 2015) [#5]

Have you actually gotten the user32.decls with correct "lib" and lines in your userlibs directory?