Author Topic: [Ndless] Tunnel (Read 28021 times)

Spenceboy98 · « **Reply #45 on:** August 27, 2013, 07:51:14 pm »

Here, try the one attached to this post. I think it should work this time.

lkj · « **Reply #46 on:** August 27, 2013, 10:45:09 pm »

Yeah, now it works. It's much slower than before, though.

Levak · « **Reply #47 on:** August 28, 2013, 02:08:33 am »

Have you made a conditional branch/jump or something smarter ?
Remember that using an if inside a setPixel is most likely time cretical. You may want to use faster designs like function pointers.

Spenceboy98 · « **Reply #48 on:** August 28, 2013, 06:43:14 am »

Quote from: lkj on August 27, 2013, 10:45:09 pm

Yeah, now it works. It's much slower than before, though.

Yeah, I figured(slower on the gray too).

Quote from: Levak on August 28, 2013, 02:08:33 am

Have you made a conditional branch/jump or something smarter ?
Remember that using an if inside a setPixel is most likely time cretical. You may want to use faster designs like function pointers.

Branch/jump? By "if inside a setPixel", do you mean like this?:

Code: [Select]

if(has_colors)
    setPixel(x,y,color,buffer);

What could be a faster way to do it?

Edit: I'll try a switch statement when I get home from school today.

Levak · « **Reply #49 on:** August 28, 2013, 07:12:57 am »

I suggest you this reading while you're getting your math class

Spenceboy98 · « **Reply #50 on:** August 28, 2013, 04:41:14 pm »

Switch case doesn't really help the speed much. How would I use the info on that link to help(I can't seem to wrap my mind around it)?

Spenceboy98 · « **Reply #51 on:** August 29, 2013, 06:42:41 am »

*BUMP*
Could one of you help make this faster? What exactly should I do instead of my if statement?

Levak · « **Reply #52 on:** August 29, 2013, 07:07:44 am »

Quote from: Spenceboy98 on August 29, 2013, 06:42:41 am

*BUMP*
Could one of you help make this faster? What exactly should I do instead of my if statement?

Without the last source updated source code ? Does anything has changed since the last one ?

Spenceboy98 · « **Reply #53 on:** August 29, 2013, 07:09:26 pm »

Quote from: Levak on August 29, 2013, 07:07:44 am

Quote from: Spenceboy98 on August 29, 2013, 06:42:41 am
*BUMP*
Could one of you help make this faster? What exactly should I do instead of my if statement?
Without the last source updated source code ? Does anything has changed since the last one ?

Here is my code now(with the switch case):

Code: [Select]

#include <os.h>
#include "utils.c"
#include "graphics3.c"
#include "math.h"
#include "nCOMMON.h"
#include "touchpad.c"

#define R5G6B5(r,g,b) (is_cx ? (((r) << 11) | ((g) << 5) | (b)) : ((int)( 0.229 * (r) + 0.587 * ((g) / 2) + 0.114 * (b)) / 2))

int nRC_enableRelativePaths(char **argv)
{
	char buf[256], *p;
	strcpy(buf, argv[0]);
	p = strrchr(buf, '/');
	if (!p)
		return -1;
	*p = '\0';
	return NU_Set_Current_Dir(buf) ? -1 : 0;
}

uint16_t* nRC_loadBMP(char *path)
{
	int size, offset, i, x, bpp, r, g, b;
	uint16_t *returnValue, color;
	FILE *temp = fopen(path, "rb");

	if(!temp)
	{
		printf("Could not open %s\n", path);
		return NULL;
	}

	// Check if the file's 2 first char are BM (indicates bitmap)
	if(!(fgetc(temp) == 0x42 && fgetc(temp) == 0x4d))
	{
		printf("Image is not a bitmap\n");
		fclose(temp);
		return NULL;
	}

	// Check the bits-per-pixel format of the bitmap and converts color accordingly
	fseek(temp, 0x1c, SEEK_SET);
	bpp = fgetc(temp);

	// Gets the 4-bytes numbers of bytes representing pixels, situated at 0x22
	// Note that a same size can represent a different number of pixels, depending on bpp
	fseek(temp, 0x22, SEEK_SET);
	size = fgetc(temp) | (fgetc(temp) << 8) | (fgetc(temp) << 16) | (fgetc(temp) << 24);

	// Gets the 4-bytes offset to the start of the pixel table, situated at 0x0a
	fseek(temp, 0x0a, SEEK_SET);
	offset = fgetc(temp) | (fgetc(temp) << 8) | (fgetc(temp) << 16) | (fgetc(temp) << 24);

	fseek(temp, offset, SEEK_SET);

	switch(bpp)
	{	// Monochrome bitmaps have 1 bit per pixel : 0 is full black, 1 is full white
		case 1:
			returnValue = malloc(size * 8 * sizeof(int));
			if(!returnValue)
			{
				printf("Could not allocate memory");
				fclose(temp);
				return NULL;
			}
			for(i = size - 1; i >= 0; i--)
			{
				color = fgetc(temp);
				for(x = 0; x < 8; x++)
				{
					returnValue[i * 8 + x] = (color & (1 << x)) ? (is_cx ? 65535 : 15) : 0;
				}
			}
			break;

		// 16-colours bitmaps have 4 bits per pixel, corresponding to a grayscale.
		// Fortunately, the non-CX screen uses the same pixel format.
		case 4:
			returnValue = malloc(size * 2 * sizeof(int));
			if(!returnValue)
			{
				printf("Could not allocate memory");
				fclose(temp);
				return NULL;
			}
			for(i = size - 1; i >= 0; i--)
			{
				x = fgetc(temp);
				color = x & 0x0f;
				returnValue[i * 2] = is_cx ? ((color * 2) << 11) | ((color * 4) << 5) | (color * 2) : color;
				color = (x >> 4) & 0x0f;
				returnValue[i * 2 + 1] = is_cx ? ((color * 2) << 11) | ((color * 4) << 5) | (color * 2) : color;
			}
			break;

		// 256-colours bitmaps have 8 bits per pixel, corresponding to an index in a palette.
		// So we must add the 8-bit value to the start of the palette to get the 32-bits colour of the pixel.
		case 8:
			printf("Paletted bitmaps not supported\n");
			fclose(temp);
			return NULL;
			break;

		// 65536-colours bitmaps have 16 bits per pixel, corresponding to the R5G6B5 colour format.
		// Fortunately, the CX screen uses the same pixel format.
		case 16:
			size >>= 1;
			returnValue = malloc(size * sizeof(int));
			if(!returnValue)
			{
				printf("Could not allocate memory\n");
				fclose(temp);
				return NULL;
			}
			for(i = size - 1; i >= 0; i--)
			{
				color = (uint16_t)(fgetc(temp) | (fgetc(temp) << 8));
				returnValue[i] = (is_cx ? color : ((int)( 0.229 * (color >> 11) + 0.587 * ((color >> 6) & 0x1f) + 0.114 * (color & 0x1f)) >> 1));
			}
			break;

		// 16777216-colours bitmaps have 24 bits per pixel, being 8 bits for red, 8 for green and 8 for blue.
		// Unfortunately, no TI-Nspire screen supports this format for now, so we have to scale it down to R5G6B5
		// even if this means that we loose some quality.
		case 24:
			size /= 3;
			returnValue = malloc(size * sizeof(int));
			if(!returnValue)
			{
				printf("Could not allocate memory");
				fclose(temp);
				return NULL;
			}
			for(i = size - 1; i >= 0; i--)
			{
				b = fgetc(temp); g = fgetc(temp); r = fgetc(temp);
				returnValue[i] = R5G6B5((int)(r / 8), (int)(g / 4), (int)(b / 8));
			}
			break;

		// This format is the same than the previous one, except that it includes an alpha byte to determine the transparence
		// degree of the pixel. I never planned to support transparency anyway.
		case 32:
			printf("32-bits bitmaps not supported\n");
			fclose(temp);
			return NULL;
			break;

		default:
			printf("Format not supported\n");
			fclose(temp);
			return NULL;
			break;
	}

	fclose(temp);
	return returnValue;
}


#define texWidth 64
#define texHeight 64
#define screenWidth 240
#define screenHeight 240

int w = 240, h = 240, x, y;

uint16_t *texture;

int distanceTable[screenWidth][screenHeight];
int angleTable[screenWidth][screenHeight];
int buffer[screenWidth][screenHeight];

void sprite1(void *buffer, int *data, int x, int y, int width, int height){
	int i, j;
	for(i = 0; i < height; i++){
		for(j = 0; j < width; j++){
			if(x+j < 320 && x+j > 0 && y+i < 240 && y+i > 0){
				if(has_colors)
					setPixel(x+j, y+i, data[i*width+j], buffer);
				else
					setPixelBuf(buffer, x+j, y+i, data[i*width+j]);
			}
		}
	}
}

uint16_t RGBColor(uint8_t r, uint8_t g, uint8_t b)
{
  return ((r / 8) << 11) | ((g / 4) << 5) | (b / 8);
}

uint16_t HSLtoRGB(int h, float s, float l) {
   float r = 0.0f; float g = 0.0f; float b = 0.0f;
   float c = (1-fabs(2*l-1))*s;
   float tc = c*(1-abs(h%2-1));
   switch(h/60) {
      case 0: r = c; g = tc; break;
      case 1: g = c; r = tc; break;
      case 2: g = c; b = tc; break;
      case 3: b = c; g = tc; break;
      case 4: b = c; r = tc; break;
      case 5: r = c; b = tc; break;
      default: break;
   }
   float m = l-c/2;
   r += m; g += m; b += m;
   return (uint16_t)(((int)(r*32)<<11)|((int)(g*64)<<5)|((int)(b*32)));
}

int main(int argc, char *argv[]) {
	char *screen;
	screen = (char*)malloc(SCREEN_BYTES_SIZE * sizeof(char));     // just a buffer
	if(!screen)
	{
		exit(0);
	}

	if(nRC_enableRelativePaths(argv))
	{
		printf("Couldn't change directory\n");
		exit(0);
	}
	texture = nRC_loadBMP("texture.bmp.tns");
	if(!texture){
		free(screen);
		exit(0);
	}
	initTP();
	if(!has_colors)
		lcd_ingray();
	for(x = 0; x < w; x++)
    for(y = 0; y < h; y++)
    {
        int angle, distance;
        float ratio = 32.0;
        distance = (int)(ratio * texHeight / sqrt((x - w / 2.0) * (x - w / 2.0) + (y - h / 2.0) * (y - h / 2.0))) % texHeight;
        angle = (0.5 * texWidth * atan2(y - h / 2.0, x - w / 2.0) / M_PI);
        distanceTable[x][y] = distance;
        angleTable[x][y] = angle;
    }
	float animation = 0;
	int shiftY = (unsigned int)(texHeight * 0.25);
	if(has_colors)
		clearScreen(RGBColor(255,255,255), screen);
	else
		clearBuf(screen);
    //begin the loop
    while(!isKeyPressed(KEY_NSPIRE_ESC))
    {
        animation = animation+0.04;
		readTP();
		int TZ = getTouchedZone4();
        //calculate the shift values out of the animation value
        int shiftX = (unsigned int)(texWidth * 1.0 * animation);
		if(isKeyPressed(KEY_NSPIRE_RIGHT) || TZ==6)
			shiftY++;
		if(isKeyPressed(KEY_NSPIRE_LEFT) || TZ==4)
			shiftY--;
        for(x = 0; x < w; x++)
        for(y = 0; y < h; y++)
        {
            //get the texel from the texture by using the tables, shifted with the animation values
            int color = texture[((unsigned int)(angleTable[x][y] + shiftY) % texHeight)*texWidth+((unsigned int)(distanceTable[x][y] + shiftX)  % texWidth)];
            buffer[x][y] = color;
        }
        sprite1(screen, buffer[0], 40, 0, 240, 240);
		switch(has_colors){
		    case 1:
                display(screen);
                //clearScreen(RGBColor(255,255,255), screen);
                break;
            case 0:
                refresh(screen);
                clearBuf(screen);
                break;
			default:
                refresh(screen);
                clearBuf(screen);
                break;
		}
    }
	free(screen);
	endTP();
	return 0;
}

Levak · « **Reply #54 on:** August 30, 2013, 04:57:29 am »

I can't see anywhere in your topic theses includes

Code: [Select]

#include "utils.c"      
#include "graphics3.c"  
#include "math.h"       
#include "nCOMMON.h"    
#include "touchpad.c"

But the problem is not here.
You said you put a switch/case but you didn't, at least where you pointed it (arround setPixel).

Look at this :

Code: [Select]

void sprite1(void *buffer, int *data, int x, int y, int width, int height){ 
    int i, j;
    for(i = 0; i < height; i++){
        for(j = 0; j < width; j++){
            if(x+j < 320 && x+j > 0 && y+i < 240 && y+i > 0){
                if(has_colors)   
                    setPixel(x+j, y+i, data[i*width+j], buffer);
                else
                    setPixelBuf(buffer, x+j, y+i, data[i*width+j]);
            }
        }
    }
}

You're asking, for each damn pixel if the screen has colors.
I will do the same, when you'll write an essay, for each letter you put on your paper, if you want a new sheet.

Look at this now :

Code: [Select]

void sprite1(void *buffer, int *data, int x, int y, int width, int height){ 
    int i, j;
    switch (has_colors)
    {
      case 1:
          for(i = 0; i < height; i++){
              for(j = 0; j < width; j++){
                  if(x+j < 320 && x+j > 0 && y+i < 240 && y+i > 0)
                      setPixel(x+j, y+i, data[i*width+j], buffer);
              }
          }
          break;
      default:
          for(i = 0; i < height; i++){
              for(j = 0; j < width; j++){
                  if(x+j < 320 && x+j > 0 && y+i < 240 && y+i > 0)
                      setPixelBuf(buffer, x+j, y+i, data[i*width+j]);
             }
         }
     }
}

There is still a condition that is being asked for each damn pixel that can be put outside of the loops and translated in a mathematical way.

Code: [Select]

void sprite1(void *buffer, int *data, int x, int y, int width, int height){ 

    if(x > SCREEN_WIDTH || y > SCREEN_HEIGHT || x+w < 0 || y+h < 0)
        return;

    if(x < 0)
    {
        w += x;
        x = 0;
    }

    if(y < 0)
    {
        h += y;
        y = 0;
    }

    if(x + w > SCREEN_WIDTH)
        w = SCREEN_WIDTH - x;
    if(y + h > SCREEN_HEIGHT)
        h = SCREEN_HEIGHT - y;

    if(w <= 0 || h <= 0)
        return;

    int i, j;
    switch (has_colors)
    {
      case 1:
          for(i = 0; i < height; i++){
              for(j = 0; j < width; j++)
                  setPixel(x+j, y+i, data[i*width+j], buffer);
          }
          break;
      default:
          for(i = 0; i < height; i++){
              for(j = 0; j < width; j++)
                  setPixelBuf(buffer, x+j, y+i, data[i*width+j]);
         }
     }
}

Untested, but should be fine.

Spenceboy98 · « **Reply #55 on:** August 30, 2013, 06:54:39 am »

Oh my gosh, I feel so stupid.

Sorry for any frustration I may have caused you. Here is an updated one attached.

Btw, could someone post more color screenies with different textures?

Levak · « **Reply #56 on:** August 30, 2013, 07:49:45 am »

Here we go

Eiyeron · « **Reply #57 on:** August 30, 2013, 07:51:26 am »

YOu should use a seamless texture, that'll avoid the seam at the end junction.

Spenceboy98 · « **Reply #58 on:** August 31, 2013, 02:04:10 pm »

Does anyone have an idea for how to add another texture(so there's two)?

Spenceboy98 · « **Reply #59 on:** September 01, 2013, 08:16:33 am »

*BUMP*

Quote from: Spenceboy98 on August 31, 2013, 02:04:10 pm

Does anyone have an idea for how to add another texture(so there's two)?

Any ideas?

Author Topic: [Ndless] Tunnel (Read 28021 times)

Spenceboy98

Re: [Ndless] Tunnel

lkj

Re: [Ndless] Tunnel

Levak

Re: [Ndless] Tunnel

Spenceboy98

Re: [Ndless] Tunnel

Levak

Re: [Ndless] Tunnel

Spenceboy98

Re: [Ndless] Tunnel

Spenceboy98

Re: [Ndless] Tunnel

Levak

Re: [Ndless] Tunnel

Spenceboy98

Re: [Ndless] Tunnel

Levak

Re: [Ndless] Tunnel

Spenceboy98

Re: [Ndless] Tunnel

Levak

Re: [Ndless] Tunnel

Eiyeron

Re: [Ndless] Tunnel

Spenceboy98

Re: [Ndless] Tunnel

Spenceboy98

Re: [Ndless] Tunnel