Oh! Is your problem that you don't know how to get the jewels moving without hijacking execution from the rest of your code?
Keep track of whether or not your jewels are active. If they are, move them forward each frame. Add an Update_Jewels() function call to your main game loop. The Fire_Jewel_*() functions should set the appropriate jewel to be "active" (so that the update function will move it) and position the jewel at beginning of its flight path.
If this is your problem and you want an example, just ask. Right now I'm off to drink as much vodka as possible.
Here's something I wrote four years ago which is somewhat similar. There's an easier way to do the trig too.
Keep track of whether or not your jewels are active. If they are, move them forward each frame. Add an Update_Jewels() function call to your main game loop. The Fire_Jewel_*() functions should set the appropriate jewel to be "active" (so that the update function will move it) and position the jewel at beginning of its flight path.
If this is your problem and you want an example, just ask. Right now I'm off to drink as much vodka as possible.
Here's something I wrote four years ago which is somewhat similar. There's an easier way to do the trig too.
Open in online IDE; initialize the usual SeedRnd MilliSecs() Graphics3D 800, 600 Global camera = CreateCamera() PositionEntity camera, 0, 10, -20 Global light = CreateLight() TurnEntity light, 20, 60, 0 ; create some minimal scenery Global plane = CreatePlane() EntityAlpha plane, 0.6 EntityColor plane, 0, 0, 255 Global mirror = CreateMirror() ; create our cannon: a stretched cube Global cannon_entity = CreateCube() Global cannon_pitch#, cannon_yaw# PositionEntity cannon_entity, 0, 6, 0 ScaleEntity cannon_entity, 1, 1, 5 ; our cannonballs will be a linked link of projectiles: entities and a vector for velocity Type projectile Field entity Field vx#, vy#, vz# End Type While Not KeyHit(1) ; control movement of cannon If KeyDown(200) Then cannon_pitch = cannon_pitch + 0.5 If KeyDown(208) Then cannon_pitch = cannon_pitch - 0.5 If KeyDown(203) Then cannon_yaw = cannon_yaw + 0.5 If KeyDown(205) Then cannon_yaw = cannon_yaw - 0.5 RotateEntity cannon_entity, cannon_pitch, cannon_yaw, 0 ; fire! If KeyHit(57) Then Local cannonball.projectile = New projectile cannonball\entity = CreateCube() PositionEntity cannonball\entity, EntityX(cannon_entity), EntityY(cannon_entity), EntityZ(cannon_entity) Local speed# = 0.5 cannonball\vx = speed * Cos(cannon_pitch) * Sin(-cannon_yaw) cannonball\vy = speed * Sin(-cannon_pitch) cannonball\vz = speed * Cos(cannon_pitch) * Cos(cannon_yaw) EndIf ; update all projectiles For this.projectile = Each projectile ; apply gravity this\vy = this\vy - 0.01 ; move according to our vector TranslateEntity this\entity, this\vx, this\vy, this\vz RotateEntity this\entity, VectorPitch(this\vx, this\vy, this\vz), VectorYaw(this\vx, this\vy, this\vz), 0 ; remove projectiles which have hit the "ground" If EntityY(this\entity) < 0 Then FreeEntity this\entity Delete this EndIf Next ; show the scene RenderWorld() Text 0, 0, "Arrow keys to move" Text 0, 20, "Space to fire" Flip Wend End