Private Sub GameLoop()
Do
DoEvents
CheckInput
UpdatePlayer
ChasePlayer
objTVEngine.Clear
objTVAtmosphere.Skybox_Render
objTVLandscape.Render
objTVEngine.RenderToScreen
Loop Until (m_boolLoop = False)
Unload Me
End Sub
Private Sub CheckInput()
Dim lngMouseX As Long, lngMouseY As Long
Dim intButton1 As Integer, intButton2 As Integer
Dim lngMouseRoll As Long, bytKeyStates() As Byte
objTVInputEngine.GetKeyPressedArray bytKeyStates()
If bytKeyStates(TV_KEY_W) Then
'move forward
End If
If bytKeyStates(TV_KEY_A) Then
'rotate left
End If
If bytKeyStates(TV_KEY_S) Then
'move backward
End If
If bytKeyStates(TV_KEY_D) Then
'rotate right
End If
objTVInputEngine.GetMouseState lngMouseX, lngMouseY, intButton1, intButton2, , lngMouseRoll
If intButton1 Then
'rotation
End If
If intButton2 Then
'rotation
End If
If intButton2 And bytKeyStates(TV_KEY_A) Then
'strafe left
End If
If intButton2 And bytKeyStates(TV_KEY_D) Then
'strafe right
End If
End Sub
Private Sub UpdatePlayer()
End Sub
Private Sub ChasePlayer()
End Sub
Convert Mouse/Keyboard Input...
Author
I would like an explanation of the math/process to convert relative mouse input (*RELATIVE*) into actor rotation updates and keyboard input into position updates. I want to do the following: 1) Get keyboard/mouse input. 2) Update actor rotation/position (based on input). 3) Make camera chase actor (third step not need explanation yet)
Here is the example of my code so far:
[Er edit my example is mostly C language. But the Cosine/Sin functions should help you out]
well it depends.
with windows you can use windows messages to recieve input.
But I'd recommend using GetAsyncKeyState(); for keyboard and POINT mouse; for the mouse.
It also depends on if your doing 2d or a 3d game here.
But to find the angle of the player so you can move him, you need to use COS and Sin functions.
Plus you need to give the player a heading. 0-360 degrees.
lets say your player is facing 90 degrees.
Sin(90) = 1;
Cos(90) = 0;
Sin is your x, and Cos is youy y. so
Player.Location+= Sin(Player.angle)*Player.moveamount;
Player.Location+= Cos(Player.angle)*Player.moveamount;
So if you think about this. If the player is facing 90 degrees, and you hit forward on your keyboard, only is X coordinate would change, his y would not.
If he was facing 0 degrees (straight up, or north, depending on your game world)
he would only move on the Y, and X wouldn't change.
if he was facing 180, then he is moving Negative Y, and X wouldnt change
Hope that makes sense, you need to at least know geometry to understand that.
You can also use Matrices (Matrix Math to do all of this stuff too, but that is Algebra 2/Trig stuff)
Also keep in mind if your programing in C, Cos And Sin return Radians. so to convert that you go
180 / 3.1415926
so Sin(Player.heading * (180 / 3.1415926));
and you have to do the same thing with Cosine.
well it depends.
with windows you can use windows messages to recieve input.
But I'd recommend using GetAsyncKeyState(); for keyboard and POINT mouse; for the mouse.
It also depends on if your doing 2d or a 3d game here.
But to find the angle of the player so you can move him, you need to use COS and Sin functions.
Plus you need to give the player a heading. 0-360 degrees.
lets say your player is facing 90 degrees.
Sin(90) = 1;
Cos(90) = 0;
Sin is your x, and Cos is youy y. so
Player.Location+= Sin(Player.angle)*Player.moveamount;
Player.Location+= Cos(Player.angle)*Player.moveamount;
So if you think about this. If the player is facing 90 degrees, and you hit forward on your keyboard, only is X coordinate would change, his y would not.
If he was facing 0 degrees (straight up, or north, depending on your game world)
he would only move on the Y, and X wouldn't change.
if he was facing 180, then he is moving Negative Y, and X wouldnt change
Hope that makes sense, you need to at least know geometry to understand that.
You can also use Matrices (Matrix Math to do all of this stuff too, but that is Algebra 2/Trig stuff)
Also keep in mind if your programing in C, Cos And Sin return Radians. so to convert that you go
180 / 3.1415926
so Sin(Player.heading * (180 / 3.1415926));
and you have to do the same thing with Cosine.
This topic is closed to new replies.
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