Author Topic: Mode 7 with Ndless !  (Read 11325 times)

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Offline Matrefeytontias

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Mode 7 with Ndless !
« on: September 30, 2012, 07:09:50 am »
Hi guys !

I programmed a simple but cool effect of Mode 7 (like the firsts F-Zero or Super Mario Kart) with C and nSDL, and I thank that I should share it :)



On the gif the program is laggy, but it's because of my bad PC ; on-calc it's way smoother.

Spoiler For "Source code":
Code: [Select]
#include <os.h>
#include <SDL/SDL.h>

#define WIDTH 320
#define HALF_WIDTH 160 // WIDTH / 2
#define HEIGHT 240
#define HALF_HEIGHT 120 // HEIGHT / 2
#define SCALE_FACTOR 6
#define FACTOR 128 //(2<<(SCALE_FACTOR+1))
#define SPEED 4

int main(void) {
SDL_Surface *screen;
SDL_Rect pixelRect, clearRect;

int Xib;
short X0 = 0, Y0 = 0;

clearRect.x = 0;
clearRect.y = HALF_HEIGHT;
clearRect.w = WIDTH;
clearRect.h = 1;

pixelRect.h = (pixelRect.w = 2);

SDL_Init(SDL_INIT_VIDEO);

screen = SDL_SetVideoMode(WIDTH, HEIGHT, is_cx?16:8, SDL_SWSURFACE);

while(!isKeyPressed(KEY_NSPIRE_ESC))
{
for(pixelRect.x = 0; pixelRect.x < WIDTH; pixelRect.x += 2)
{
Xib = (pixelRect.x - HALF_WIDTH) * HEIGHT;
for(pixelRect.y = HALF_HEIGHT; pixelRect.y < HEIGHT; pixelRect.y += 2)
{
if( ( (( (WIDTH - (Xib / pixelRect.y) + X0) >> SCALE_FACTOR) & 1) + (( (2 * (HEIGHT - pixelRect.y) + Y0) >> SCALE_FACTOR) & 1 ) ) & 1)
{
SDL_FillRect(screen, &pixelRect, (Uint32)0);
}
}
}

SDL_FillRect(screen, &clearRect, (Uint32)0);

SDL_Flip(screen);
SDL_FillRect(screen, NULL, (Uint32)0xffffffff);


if(isKeyPressed(KEY_NSPIRE_LEFT))
{
X0 = (FACTOR + X0 - SPEED) % FACTOR;
}

if(isKeyPressed(KEY_NSPIRE_RIGHT))
{
X0 = (FACTOR + X0 + SPEED) % FACTOR;
}

if(isKeyPressed(KEY_NSPIRE_UP))
{
Y0 = (FACTOR + Y0 - SPEED) % FACTOR;
}

if(isKeyPressed(KEY_NSPIRE_DOWN))
{
Y0 = (FACTOR + Y0 + SPEED) % FACTOR;
}
}

SDL_FreeSurface(screen);
SDL_Quit();
return 0;
}

Share comments :)

Offline Alex

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Re: Mode 7 with Ndless !
« Reply #1 on: September 30, 2012, 08:02:30 am »
C'est sympas matref. Continue :)

Offline Lionel Debroux

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Re: Mode 7 with Ndless !
« Reply #2 on: September 30, 2012, 11:13:11 am »
Je suis tout à fait d'accord, mais english spoken here ;)
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Offline annoyingcalc

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Re: Mode 7 with Ndless !
« Reply #3 on: September 30, 2012, 12:04:52 pm »
NICE!
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Offline cyanophycean314

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Re: Mode 7 with Ndless !
« Reply #4 on: September 30, 2012, 09:08:25 pm »
Looks really nice!  :)

Offline Juju

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Re: Mode 7 with Ndless !
« Reply #5 on: September 30, 2012, 11:11:45 pm »
Hey that looks pretty cool :D

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Re: Mode 7 with Ndless !
« Reply #6 on: September 30, 2012, 11:43:32 pm »
That's looking awesome! :D

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Offline tr1p1ea

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Re: Mode 7 with Ndless !
« Reply #7 on: October 01, 2012, 03:33:42 am »
Looking good, have you put any thought into rotations?
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Offline DJ Omnimaga

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Re: Mode 7 with Ndless !
« Reply #8 on: October 01, 2012, 03:36:07 am »
O.O looks really sweet! I wonder how it will look like with actual sprites?

Offline aeTIos

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Re: Mode 7 with Ndless !
« Reply #9 on: October 01, 2012, 03:48:05 am »
code in spoiler <_<
Looks nice :D
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Offline Hayleia

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Re: Mode 7 with Ndless !
« Reply #10 on: October 01, 2012, 06:58:52 am »
That looks nice Matref :D
Also, you have +83 ratings :P

code in spoiler <_<
Did you mean "Chrome <_<" ? jk :P
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Offline Alex

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Re: Mode 7 with Ndless !
« Reply #11 on: October 01, 2012, 02:08:11 pm »
Je suis tout à fait d'accord, mais english spoken here ;)
Ok Hayleia, sorry ^^

Offline apcalc

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Re: Mode 7 with Ndless !
« Reply #12 on: October 01, 2012, 05:51:42 pm »
Looks great!  Excellent work!


Offline Hayleia

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Re: Mode 7 with Ndless !
« Reply #13 on: October 02, 2012, 01:16:41 am »
Je suis tout à fait d'accord, mais english spoken here ;)
Ok Hayleia, sorry ^^
??? That was not me :P
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Re: Mode 7 with Ndless !
« Reply #14 on: October 02, 2012, 03:36:40 pm »
code in spoiler <_<
Not his fault if Chrome manages to be worse than Internet Explorer in certain ways :P