Author Topic: Mode 7 with Ndless ! (Read 16766 times)

Eiyeron · « **Reply #15 on:** October 02, 2012, 03:54:46 pm »

The only problem I saw from chrome!
Oh and by the way, it should add a The_Game_filter

Alex · « **Reply #16 on:** October 03, 2012, 07:07:12 am »

Quote from: Hayleia on October 02, 2012, 01:16:41 am

Quote from: Alex on October 01, 2012, 02:08:11 pm
Quote from: Lionel Debroux on September 30, 2012, 11:13:11 am
Je suis tout à fait d'accord, mais english spoken here
Ok Hayleia, sorry ^^
That was not me

Sorry. ^^

DJ Omnimaga · « **Reply #17 on:** October 14, 2012, 07:01:20 pm »

Quote from: Eiyeron on October 02, 2012, 03:54:46 pm

Oh and by the way, it should add a The_Game_filter

Wat

On topic note, have you managed to successfully add rotation without losing much speed?

Matrefeytontias · « **Reply #18 on:** October 15, 2012, 01:17:34 am »

For now, I'm trying to display a fullscreen "mode 7" 'd image. Then I'll add rotations

Matrefeytontias · « **Reply #19 on:** January 02, 2013, 01:23:25 pm »

Heavy bump,

I'm back with Mode 7, and I planned to make a game using it

But for now, here's a screenie of an infinite textured and mode7'd ground, with full moves and rotations :

The quality here is because of the gif, it's far better on-calc

Also, I have a question : in order to avoid converting the texture in 2⁴² lines of data, I access texture.bmp.tns using the absolute path (SDL_LoadBMP("/documents/Examples/texture.bmp.tns");). Is there a way to load the file texture.bmp.tns which is in the same directory as the executable ? I tried SDL_LoadBMP("texture.bmp.tns"); it just doesn't work.

Spoiler For Source code:

Code: [Select]

#include <os.h>
#include <SDL/SDL.h>
#include <fdlibm.h>

#define SCREEN_W 320
#define SCREEN_H 240
#define IMG_W 256
#define IMG_H 256

#define fsin(x) sin(x * M_PI / 128)
#define fcos(x) cos(x * M_PI / 128)

void setPixel(SDL_Surface *surface, int x, int y, Uint32 pixel);
Uint32 getPixel(SDL_Surface *surface, int x, int y);

int main(void)
{
	SDL_Surface *screen, *bitmap, *sky;
	SDL_Event event;
	SDL_Rect skyRect;
	skyRect.x = (skyRect.y = 0);
	skyRect.w = SCREEN_W;
	skyRect.h = SCREEN_H >> 2;
	Uint32 color = 0;

	float sinLUT[256];
	float cosLUT[256];
	
	float distance, hScale, line_dx, line_dy, space_x, space_y, scaleX = 200.0, scaleY = 200.0, space_z = 96.0,
		offsetX = 870, offsetY = 1515;
	int screen_x, screen_y, horizon = 0, x;

	unsigned char angle = 0, speedX = 4, speedY = 4, speedAngle = 4;

	SDL_Init(SDL_INIT_VIDEO);
	
	screen = SDL_SetVideoMode(SCREEN_W, SCREEN_H, is_cx?16:8, SDL_SWSURFACE);

	bitmap = SDL_LoadBMP("/documents/Examples/texture.bmp.tns"); // TODO : make the load relative

	for(x = 0; x < 256; x++)
	{
		sinLUT[x] = fsin(x);
		cosLUT[x] = fcos(x);
	}

	if(!bitmap)
	{
		SDL_Quit();
		exit(1);
	}

	while(1)
	{
		SDL_PollEvent(&event);

		if(isKeyPressed(KEY_NSPIRE_ESC))
		{
			break;
		}
		if(isKeyPressed(KEY_NSPIRE_DOWN))
		{
			offsetX -= cosLUT[angle] * speedX;
			offsetY -= sinLUT[angle] * speedY;
		}
		if(isKeyPressed(KEY_NSPIRE_LEFT))
		{
			angle = (angle - speedAngle) & 0xff;
		}
		if(isKeyPressed(KEY_NSPIRE_RIGHT))
		{
			angle = (angle + speedAngle) & 0xff;
		}
		if(isKeyPressed(KEY_NSPIRE_UP))
		{
			offsetX += cosLUT[angle] * speedX;
			offsetY += sinLUT[angle] * speedY;
		}
		
		for(screen_y = SCREEN_H/4; screen_y < SCREEN_H; screen_y += 2)
		{
			distance = space_z * scaleY / (screen_y + horizon);
			hScale = distance / scaleX;

			line_dx = -sinLUT[angle] * hScale;
			line_dy = cosLUT[angle] * hScale;

			space_x = offsetX + distance * cosLUT[angle] - SCREEN_W/4 * line_dx;
			space_y = offsetY + distance * sinLUT[angle] - SCREEN_W/4 * line_dy;

			for(screen_x = 0; screen_x < SCREEN_W; screen_x += 2)
			{
				if(SDL_LockSurface(bitmap) != 0)
				{
					printf("Can't access bitmap");
					exit(2);
				}
				if(SDL_LockSurface(screen) != 0)
				{
					printf("Can't access screen");
					exit(2);
				}
				color = getPixel(bitmap, (unsigned int)space_x % IMG_W, (unsigned int)space_y % IMG_H);
				
				setPixel(screen, screen_x, screen_y, color);
				setPixel(screen, screen_x + 1, screen_y, color);
				setPixel(screen, screen_x, screen_y + 1, color);
				setPixel(screen, screen_x + 1, screen_y + 1, color);
				
				SDL_UnlockSurface(screen);
				SDL_UnlockSurface(bitmap);

				space_x += line_dx;
				space_y += line_dy;
			}
		}
		
		SDL_FillRect(screen, &skyRect, SDL_MapRGB(screen->format, 255, 255, 255));
		SDL_Flip(screen);
	}

	SDL_FreeSurface(bitmap);
	SDL_Quit();

	return 0;
}

void setPixel(SDL_Surface *surface, int x, int y, Uint32 pixel)
{
    int bpp = surface->format->BytesPerPixel;

    Uint8 *p = (Uint8 *)surface->pixels + y * surface->pitch + x * bpp;

    switch(bpp) {
    case 1:
        *p = pixel;
        break;

    case 2:
        *(Uint16 *)p = pixel;
        break;

    case 3:
        if(SDL_BYTEORDER == SDL_BIG_ENDIAN) {
            p[0] = (pixel >> 16) & 0xff;
            p[1] = (pixel >> 8) & 0xff;
            p[2] = pixel & 0xff;
        } else {
            p[0] = pixel & 0xff;
            p[1] = (pixel >> 8) & 0xff;
            p[2] = (pixel >> 16) & 0xff;
        }
        break;

    case 4:
        *(Uint32 *)p = pixel;
        break;
    }
}

Uint32 getPixel(SDL_Surface *surface, int x, int y)
{
    int bpp = surface->format->BytesPerPixel;
	Uint32 value;
    Uint8 *p = (Uint8 *)surface->pixels + y * surface->pitch + x * bpp;

    switch(bpp) {
    case 1:
        value = *p;
        break;

    case 2:
        value = *(Uint16 *)p;
        break;

    case 3:
        if(SDL_BYTEORDER == SDL_BIG_ENDIAN) {
            value = (p[0] & 0xff) | (p[1] << 8) | (p[2] << 16);
        } else {
            value = (p[2] & 0xff) | (p[1] << 8) | (p[0] << 16);
        }
        break;

    case 4:
        value = *(Uint32 *)p;
        break;
    }
	return value;
}

Nick · « **Reply #20 on:** January 02, 2013, 01:26:22 pm »

this is wonderful, vongratz! It looks really good

What game are you planning? or is it still a secret?
anyway, nice work, it might get used in future games too

Lionel Debroux · « **Reply #21 on:** January 02, 2013, 01:31:47 pm »

Looks good, indeed

For some game types, the camera is at a lower altitude bove ground, and closer to horizontal position (lower angle value).

Matrefeytontias · « **Reply #22 on:** January 02, 2013, 01:32:00 pm »

Thanks

I'll surely do an F-Zero game, I don't want to make something more difficult than that

EDIT : ninja'd

@ldebroux yeah I know, but I got problems with scaling (b/c the texture is too large), I didn't find any better way than growing the camera (I'll fix that later).

Someone has a solution for the file loading thing ?

ElementCoder · « **Reply #23 on:** January 02, 2013, 01:36:43 pm »

This looks nice. But what exactly is Mode 7? I've seen it quite a few times by now.

Lionel Debroux · « **Reply #24 on:** January 02, 2013, 01:38:30 pm »

https://en.wikipedia.org/wiki/Mode7

ElementCoder · « **Reply #25 on:** January 02, 2013, 01:42:47 pm »

I kinda knew someone would post that

I guess Linear Algebra has its uses after all

Quote from: Matrefeytontias on January 02, 2013, 01:32:00 pm

I'll surely do an F-Zero game, I don't want to make something more difficult than that

Even not knowing (before wikipedia) what Mode7 was, I immediately thought about this. Please do it

Matrefeytontias · « **Reply #26 on:** January 03, 2013, 05:43:57 am »

Sprite !

I post with only this small update because it was such a pain to make the texture load relative and the masked sprite routine

ElementCoder · « **Reply #27 on:** January 03, 2013, 06:01:21 am »

O_O Blue Falcon

You're not supposed to go backwards

This is looking great, keep it up you have my support

Matrefeytontias · « **Reply #28 on:** January 03, 2013, 06:09:40 am »

I created another topic F-Zero : TrackSpire because it's now the subject. So I lock this topic.

Author Topic: Mode 7 with Ndless ! (Read 16766 times)

Eiyeron

Re: Mode 7 with Ndless !

Alex

Re: Mode 7 with Ndless !

DJ Omnimaga

Re: Mode 7 with Ndless !

Matrefeytontias

Re: Mode 7 with Ndless !

Matrefeytontias

Re: Mode 7 with Ndless !

Nick

Re: Mode 7 with Ndless !

Lionel Debroux

Re: Mode 7 with Ndless !

Matrefeytontias

Re: Mode 7 with Ndless !

ElementCoder

Re: Mode 7 with Ndless !

Lionel Debroux

Re: Mode 7 with Ndless !

ElementCoder

Re: Mode 7 with Ndless !

Matrefeytontias

Re: Mode 7 with Ndless !

ElementCoder

Re: Mode 7 with Ndless !

Matrefeytontias

Re: Mode 7 with Ndless !