Radar Rotate
Author
Hello,
I was thinking how to make my enemies radar rotating by the Yaw of the camera, but the problem is:
I can rotate the sprite texture of the radar but not the points of enemies together.
So i thought maybe there is a thing in DirectX which allow you draw on a temp buffer, draw the sprite, then draw the points, and then rotate the whole buffer then draw it.
Is there a such thing ?
Thanks.
Author
Ok, i seem to find a start point.
Rotate the sprite.
For the points in radar:
I take a point, create a line from the point to the center point on the radar.
Rotate that line by X degrees, the end of the line will be the new point.
But i have no clue on how to make this process with DirectX.
Could someone please help me ?
Thanks alot.
Rotate the sprite.
For the points in radar:
I take a point, create a line from the point to the center point on the radar.
Rotate that line by X degrees, the end of the line will be the new point.
But i have no clue on how to make this process with DirectX.
Could someone please help me ?
Thanks alot.
Actually you should do something like:
- calculate each radar blip position
- rotate the radar blips based on the player's rotation
- draw the radar
- calculate each radar blip position
- rotate the radar blips based on the player's rotation
- draw the radar
Wouldn't there be a way around this with multiplying the world defining matrix in a different order? Like Translate*Rotate*Scale or something?
If not your best solution is some mathematical equation based on radian movement.
If not your best solution is some mathematical equation based on radian movement.
I did something like that time ago:
for(;max enemies;)
D3DXVECTOR2 dir = yourPos - enemiePos[];
D3DXMatrixTransformation2D(&Matrix,NULL,NULL,NULL,NULL,YAW_on_Radians,NULL);
SpriteObj->SetTransform(&Matrix);
D3DXVec2TransformCoord(&dir,&dir,&Matrix);
D3DXVECTOR2 FinalVect(dir.x+SCREENXOFFSET,dir.y+SCREENYOFFSET);
D3DXMatrixTransformation2D(&Matrix,&D3DXVECTOR2(0,0),0.0,NULL,NULL,0.0,&FinalVect);
SpriteObj->SetTransform(&Matrix);
DRAW YOUR ENEMY POINT ON THE RADAR
I mixed pseudo code and code because that are the directx 2d functions,
the variable YAW_on_Radians is the Yaw of your camera, yourPos are the
2D vector that represent your position, the enemiePos are the position of
each of your enemies, SCREENOFFSET for x and y are the offset of your screen
coordinates on pixels.
Hope that can help, my video with the radar:
the graphics part is not good, but the radar works =P
for(;max enemies;)
D3DXVECTOR2 dir = yourPos - enemiePos[];
D3DXMatrixTransformation2D(&Matrix,NULL,NULL,NULL,NULL,YAW_on_Radians,NULL);
SpriteObj->SetTransform(&Matrix);
D3DXVec2TransformCoord(&dir,&dir,&Matrix);
D3DXVECTOR2 FinalVect(dir.x+SCREENXOFFSET,dir.y+SCREENYOFFSET);
D3DXMatrixTransformation2D(&Matrix,&D3DXVECTOR2(0,0),0.0,NULL,NULL,0.0,&FinalVect);
SpriteObj->SetTransform(&Matrix);
DRAW YOUR ENEMY POINT ON THE RADAR
I mixed pseudo code and code because that are the directx 2d functions,
the variable YAW_on_Radians is the Yaw of your camera, yourPos are the
2D vector that represent your position, the enemiePos are the position of
each of your enemies, SCREENOFFSET for x and y are the offset of your screen
coordinates on pixels.
Hope that can help, my video with the radar:
the graphics part is not good, but the radar works =P
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