Messages

1

Graphics / skid marks

« on: October 21, 2010, 01:11:00 pm »

I got it working now, the code is not complete yet (and contains errors), but the performance is bad :-(

initialization

Code: [Select]

Color c(0,0,0,0);
imgSkids = new Image(SCREEN_WIDTH, SCREEN_HEIGHT, c);
sprtSkids = Sprite(*imgSkids);
int dim = imgSkids->GetWidth() * imgSkids->GetHeight() * 4;
skidmarks = new Uint8[dim];
for (int i = 0; i < dim; i++)
i % 4 != 0 ? skidmarks[i] = 0 : skidmarks[i] = 255;

called once per frame

Code: [Select]


sprtCarPos = sprtCar.GetPosition();
Uint8 *pixel = &skidmarks[(int)((sprtCarPos.x + (sprtCarPos.y * imgSkids->GetWidth())) * 4)];

if (ABS(lateralforce_f.y) > ABS(MAX_GRIP))
{
*pixel = 0;
*(pixel+1) = 0;
*(pixel+2) = 0;
*(pixel+3) = 255;
imgSkids->LoadFromPixels(imgSkids->GetWidth(), imgSkids->GetHeight(), skidmarks);
w.Draw(sprtSkids);
}

2

Graphics / skid marks

« on: October 21, 2010, 10:33:29 am »

Thanks Laurent, will try that.

3

Graphics / skid marks

« on: October 21, 2010, 10:09:38 am »

I tried shapes. I added a shape to a list every frame (when the car slides), and then drew the hole list. The framerate droppes at a couple hundred shapes.

I don't use a 'camera', so the hole map is always visible, and so are the skidmarks, which probably could easily reach 10000. That's why I wanted to use pixels.

4

Graphics / skid marks

« on: October 21, 2010, 09:00:47 am »

Everytime a car slides (in a curve for example), I want to draw permanent skidmarks for every tire that slips.

5

Graphics / skid marks

« on: October 21, 2010, 08:36:41 am »

Nice project (though a bit overkill for me), but I want to draw the skid marks permanently on the screen.

6

Graphics / skid marks

« on: October 20, 2010, 10:44:22 pm »

Hi,
I'm working on a topdown racing game (GTA like).
I want to draw skid marks of my cars. What would be a fast way to do this?

I tried sf::Shapes in a list, which obviously doesn't work for very long ;-)
Then I tried to have a initially transparent image (same size as the screen) and then use setpixel to draw the skid marks. But even with only one pixel drawn per frame, there is a huge framerate drop.

7

Graphics / Rotating/Snapping

« on: June 06, 2010, 08:38:15 am »

Still got the problem, it's SFML1.6 btw.

8

Graphics / Rotating/Snapping

« on: June 01, 2010, 01:49:40 pm »

Laptop: some Intel-drivers, PC: NVidia
WinXP on both.

Build on PC with MS VS 2008 Professional, Standard on Laptop.

Will try the laptop-binaries on the pc later today.

9

Graphics / Rotating/Snapping

« on: May 31, 2010, 10:37:59 pm »

Hi,
I'm working on a map editor.
I have tiles of 128x128 to place in a grid.
I'm calculating the positions for the tiles from the mouseposition, so while dragging a tile, it snaps to the grid.

I've done it like this: int tile_x = mouse_x/GRID*GRID. (kind of normalizing it to the grid)

Now when I rotate the tiles I get gaps between some of them, is that because of the position? What would be a smarter way to do it?




Edit: Just tested on an other computer, and I dont have any gaps here. Doesn't make sense to me :-(

10

Graphics / [solved]Tiles are showing black lines at the borders (1.6)

« on: May 30, 2010, 05:56:51 pm »

Thanks...had the same problem and it was driving me nuts :-)

11

General / Many warnings when linking

« on: April 08, 2010, 10:34:26 pm »

Hi,
I'm using static linking and compiled SFML, I guess the debug files are somewhere in SFLM-1.6\Temp\vc2008. What do I have to do with them to get rid of the warnings?