New Game Maker Studio Sonic Engine

The problem is you're using the HTML5 client. You need Game Maker Studio Standard.

Standard only exports as .gmz and .gm81 and, even if I were to export the later, it would just import corrupted into your client because it's incompatible.

 

Alright, try this and see if it will work, Hart.

EDIT: Here's a .gm81 for good measure.

 

In psuedo-code: if the player is not spinning and his visual angle does not match his actual angle, increase the visual angle by 2.8125 times the sign of whatever direction the actual angle is from the visual angle, then wrap the result to 360 degrees.

to snap this to degrees of 45:

Code (Text):

1. if not spinning and (image_angle!=angle) image_angle = angle_wrap(round((image_angle+2.8125*sign(angle_distance(image_angle, angle)))/45)*45);

You just divide the result by 45, round it, then re-multiply 45 to get the nearest degree of 45.

That line is a bit loaded, so you could also split it to make it easier to read:

Code (Text):

1. if not spinning and (image_angle!=angle)
2. {
3.     image_angle += 2.8125*sign(angle_distance(image_angle, angle));
4.     image_angle = angle_wrap(round(image_angle/45)*45);
5. }

It'd probably be better, however, to apply this same wrapping where the image_angle is used in the draw event:

Code (Text):

1. if sprite_index>-1 draw_sprite_ext(sprite_index, image_index, floor(x), floor(y), image_xscale*facing, image_yscale, round(image_angle/45)*45, image_blend, image_alpha);

EDIT: Ninja'd.

 

If you do the above, remember to apply it to all objEffects that use the same angle. (ie. objTailsEffect)

 

Opening post updated with a new build. To encourage updating, I've killed all the old links.

Before anyone asks, yes, all the sound issues are gone AFAIK.

 

Promotional video added to the OP. Check it out.

 

The free edition has a resource cap that impedes the amount of scripts and objects needed for the engine to run successfully, and some functionality is limited in the free version compared to standard, such as functions for manipulating surfaces.

 

New version now available! Here's a changelog: (it is also included with the editable)

Spoiler

GENERAL NOTES

New control scheme for global game functionality:
Alt + F4: force-quit.
F3: Double window size.
F4: Fullscreen.
F5: Scanlines.
"C" key: Free-roaming state. (Debug mode only)

Made various adjustments to code complexity too numerous to list.
Added inline documentation to almost all scripts.
objPath and objExampleQuicksand are now deprecated. (See "Rooms\Zones\Examples" for new examples)
Added proper Sonic 2 Title Card and Sonic 1 drown popup. (See "Objects\Scene\Overlays")
"Perfect Bonus" now added to objScoreCard.
Music queuing and playback is now handled by objMusic. (See "Objects\Game")
Direct playback overriding the priority queue is possible. (music_play)
Music overlays (eg. 1up music) now have their own playback function. (music_play_overlay)
Global sound effect volume can be adjusted. (audio_set_volume_sound)
Basic loading and saving functionality is available. (See "Scripts/Game/File")
On failure, the input_check* functions now return -1, not 0.
Can now "pause" the game from anywhere. (game_set_active)
Can travel directly to a specific scene as long as you know its scene index number. (scene_goto)
in_view now accepts a second argument for adjusting the offset of the view boundary.
The transition_* scripts were merged into transition_to. (See "Scripts/Scene/Overlays/Transitions")
Player bounding box size is now determined at character selection. (player_change_character)
State and state change scripts were merged together; state changes are now accessed by calling the corresponding state script using a negative number as an argument (usually -1; some special cases use lower numbers, such as jumping)
Listener position now updated in objZone instead of objPlayer.
DASH-style angle detection implemented for those wanting to construct custom masks. (See "Objects\Scene\Zone Objects\Parents\Collider")
objBridge code reworked to be one single platform instead of several smaller ones.
objSignPost must be deliberately touched now; simply passing its x-position is no longer enough.
objWater is now a customizable object that can be stretched to "fill" specific areas. (See "Rooms\Zones\Examples" for example usage)
Water-running can be disabled per-instance of objWater.
objConveyorBelt created in response to confusion around objExampleMovingPlatformH. The later no longer works like a conveyor belt.
objExampleCorkscrew now available. (See "Objects\Scene\Zone Objects\Specific\Examples")


RESOURCE CHANGES

SPRITES
New: sprTitleCardBorder (in "Scene\Overlays\Title Card")
New: sprTitleCardGame (in "Scene\Overlays\Title Card")
New: sprDrownPopup (in "Scene\Overlays")
New: sprWaterMask (in "Scene\Zone Objects\General\Water")
New: sprKnucklesFlipReverse (in "Scene\Zone Objects\Player\Characters\Knuckles")
New: sprSonicFlipReverse (in "Scene\Zone Objects\Player\Characters\Sonic")
New: sprTailsFlipReverse (in "Scene\Zone Objects\Player\Characters\Tails")
New: sprRhinobotDust (in "Scene\Zone Objects\Specific\Enemies\Rhinobot")
New: sprExampleConveyorBelt (in "Scene\Zone Objects\Specific\Examples")
New: sprExampleCorkscrew (in "Scene\Zone Objects\Specific\Examples")

Removed: sprExampleBreakableDebris
Removed: sprExampleQuicksand
Removed: sprPath

Edited: sprExampleEnemy renamed sprRhinobot


SOUNDS
Edited: bgmClear, bgmDrowning, bgmGameOver changed into .wav files.
Edited: bgmTest renamed bgmZoneEH


BACKGROUNDS
New: backScanlines (in "Game")


SCRIPTS
New: audio_set_volume_sound (in "Game\Audio")
New: music_play (in "Game\Audio")
New: music_play_overlay (in "Game\Audio")
New: load_controls (in "Game\File")
New: load_settings (in "Game\File")
New: save_controls (in "Game\File")
New: save_settings (in "Game\File")
New: scene_goto (in "Game\Program")
New: game_set_active (in "Game\Program")
New: collision_box_vertical (in "Scene\Genera\Collision")
New: transition_to (in "Scene\Overlays\Transitions")
New: player_reaction_corkscrew (in "Scene\Player\Physics\Reactions\Specific")
New: player_reaction_sign_post (in "Scene\Player\Physics\Reactions")
New: player_reaction_water (in "Scene\Player\Physics\Reactions")
New: player_get_surface_angle (in "Scene\Player\Physics\Rotation")
New: player_get_surface_angle_air (in "Scene\Player\Physics\Rotation")
New: player_set_wall (in "Scene\Player\Physics\Update")
New: player_is_slipping (in "Scene\Player\State\Functions")
New: player_is_debugging (in "Scene\Player\State\Specific")

Removed: transition_fade
Removed: transition_titlecard
Removed: player_landing
Removed: player_is_slide_standing

Edited: audio_clear_priority renamed music_delete
Edited: audio_play_priority renamed music_play_priority
Edited: audio_set_priority renamed music_add
Edited: level_goto_next renamed scene_goto_next
Edited: angle_distance renamed distance_to_angle
Edited: player_collision_ceiling renamed player_get_collision_ceiling
Edited: player_collision_floor renamed player_get_collision_floor
Edited: player_collision_object renamed player_get_collision_soft
Edited: player_collision_wall renamed player_get_collision_wall
Edited: player_movement_air renamed player_move_air
Edited: player_movement_ground renamed player_move_floor
Edited: player_update_ramp renamed player_can_launch
Edited: player_get_terrain_angle renamed player_get_angle
Edited: player_wall_eject renamed player_get_wall_offset
Edited: player_get_reaction renamed player_react
Edited: player_update_cliff renamed player_set_cliff_facing
Edited: player_get_terrain renamed player_set_floor
Edited: player_get_terrain_list renamed player_set_local_list
Edited: player_floor_transfer renamed player_set_mask_rotation
Edited: player_slope_factor renamed player_set_slope_friction
Edited: all player_state_* and player_is_* scripts were merged together; see general notes
Edited: player_state_standby renamed player_is_waiting


TIME LINES
New: animKnucklesCorkscrew (in "Zone Objects\Player\Characters\Knuckles")
New: animSonicCorkscrew (in "Zone Objects\Player\Characters\Sonic")
New: animTailsCorkscrew (in "Zone Objects\Player\Characters\Tails")
New: animShieldLightning (in "Zone Objects\Player\Effects")

Removed: animShieldLightningFront
Removed: animShieldLightningBack


OBJECTS
New: objMusic (in "Game")
New: objSceneObject (in "Scene")
New: objDrownPopup (in "Scene\Overlays")
New: objCurveConcaveAuto (in "Scene\Zone Objects\General\Terrain Masks\Experimental")
New: objExampleConveyorBelt (in "Scene\Zone Objects\Specific\Examples\Moving Platforms")

Removed: objInputDummy
Removed: objCapsuleSwitch
Removed: objPath
Removed: objExampleQuicksand

Edited: objProgram renamed to objGame
Edited: objTitlecard renamed objTitleCard
Edited: objScorecard renamed objScoreCard
Edited: objLevel renamed objZone
Edited: objField renamed objTrigger
Edited: objNonSolid renamed objColliderSoft
Edited: objSolid renamed objColliderHard
Edited: objSceneObject renamed objZoneObject
Edited: objExampleEnemy renamed objRhinobot
Edited: objExampleBackground1 renamed objExampleBack1
Edited: objExampleBackground2 renamed objExampleBack2


ROOMS
New: zoneTest3

Edited: startup renamed roomStart
Edited: test_level renamed zoneTest
Edited: test_level_2 renamed zoneTest2