devkitPro

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vramSetBankA( VRAM_A_TEXTURE );

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vramSetBankA( VRAM_A_TEXTURE );
vramSetBankE(VRAM_E_TEX_PALETTE);

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/******************************************************************************
*******************************************************************************
	Easy GL2D 
	Sprites example
	Shows a some sprite capabilities of easy GL2D
	
	Relminator (Richard Eric M. Lope BSN RN)
	http://rel.betterwebber.com
	
	Thanks to:
	Anya Therese B. Lope for letting me use her picture
	Adigun A. Polack for the enemies sprites
	Patater (Jaeden Amero) for the shuttle sprites
	capcom for Zero's image

*******************************************************************************
******************************************************************************/ 
 
#include <nds.h>
#include <stdio.h>
#include <string.h>
#include <gl2d.h>

// GRIT auto-generated  files
#include "enemies.h"
#include "zero.h"
#include "tiles.h"
#include "shuttle.h"
#include "anya.h"


// Texture Packer auto-generated UV coords

#include "uvcoord_enemies.h"
#include "uvcoord_zero.h"


// Declare our BG drawing routine
void DrawBG( glImage *images );



const int BRAD_PI = 1 << 14;

// This imagesets would use our texture packer generated coords so it's kinda
// safe and easy to use 
// ENEMIES_NUM_IMAGES is a value from "uvcoord_crono.h"
// ZERO_NUM_IMAGES is a value from "uvcoord_zero.h"
glImage  Enemies[ENEMIES_NUM_IMAGES];	// spriteset
glImage  Zero[ZERO_NUM_IMAGES];			// spriteset

// This tileset won't make use of our texture packer generated coords.
// Messy, manual and prone to errors.
// BMP is 256x256 and tiles are 16x16 so.. (256/16) * (256 /16) = 16 * 16
glImage  Tiles[(256/16) * (256/16)];  

// These sprites are single texture only so no need to
// do anything special
glImage  Shuttle[1];					// single image	
glImage  Anya[1];


int main() 
{	

	
	int i;
	
	
	//set mode 5, enable BG0 and set it to 3D
	videoSetMode( MODE_5_3D );
	
	
		consoleDemoInit();
	
	
	// initialize gl2d
	glScreen2D();
	
	// Set up enough texture memory for our textures
	// Bank A is just 128kb and we are using 194 kb of
	// sprites
	vramSetBankA( VRAM_A_TEXTURE );
	vramSetBankB( VRAM_B_TEXTURE );
	vramSetBankE(VRAM_E_TEX_PALETTE);

	// Make an all-white palette for stencil effects
	unsigned short *hitPal = malloc( 256 * sizeof(unsigned short) );
	
	for( i = 0; i < 256; i++ )
	{
		hitPal[i] = (0xFF << 8 ) | 0xFF;
	}
	
	int hitTexPal = gluTexLoadPal( hitPal, 512, GL_RGB256 );

	free( hitPal );
	
	
	// Load our Enemies texture
	// We used glLoadSpriteSet since the texture was made
	// with my texture packer.
	int EnemiesTextureID = 
		glLoadSpriteSet( Enemies,				// pointer to glImage array
						 ENEMIES_NUM_IMAGES, 	// Texture packer auto-generated #define
						 enemies_texcoords,		// Texture packer auto-generated array
						 GL_RGB256,				// texture type for glTexImage2D() in videoGL.h 
						 TEXTURE_SIZE_256,		// sizeX for glTexImage2D() in videoGL.h
						 TEXTURE_SIZE_256,		// sizeY for glTexImage2D() in videoGL.h
						 GL_TEXTURE_WRAP_S|GL_TEXTURE_WRAP_T|TEXGEN_OFF|GL_TEXTURE_COLOR0_TRANSPARENT, // param for glTexImage2D() in videoGL.h
						 (u8*)enemiesBitmap	 	// image data generated by GRIT
					   );
	
	
	// Load our 256 color enemies palette
	// enemiesPal, enemiesPalLen are found in a GRIT generated header
	// Also save the return value for reference later since we
	// are using more than 1 palette.
	int EnemiesTexPal = gluTexLoadPal( enemiesPal, enemiesPalLen, GL_RGB256 );


	// Load our Zero texture
	// We used glLoadSpriteSet since the texture was made
	// with my texture packer.
	// No need to load the palette since enemies and zero
	// share the same palette.
	int ZeroTextureID = 
		glLoadSpriteSet( Zero,					// pointer to glImage array
						 ZERO_NUM_IMAGES, 		// Texture packer auto-generated #define
						 zero_texcoords,		// Texture packer auto-generated array
						 GL_RGB256,				// texture type for glTexImage2D() in videoGL.h 
						 TEXTURE_SIZE_128,		// sizeX for glTexImage2D() in videoGL.h
						 TEXTURE_SIZE_256,		// sizeY for glTexImage2D() in videoGL.h
						 GL_TEXTURE_WRAP_S|GL_TEXTURE_WRAP_T|TEXGEN_OFF|GL_TEXTURE_COLOR0_TRANSPARENT, // param for glTexImage2D() in videoGL.h
						 (u8*)zeroBitmap	 	// image data generated by GRIT
					   );
	
	
	// Our texture handle for our tiles
	// I used glLoadTileSet since the texture 
	// is just a bunch of 16x16 tiles in a 256x256
	// tileset so we don't need a texture packer for this.
	int TilesTextureID = 
		glLoadTileSet( Tiles,				// pointer to glImage array
					   16,					// sprite width
					   16,					// sprite height
					   256,					// bitmap width
					   256,					// bitmap height
					   GL_RGB256,			// texture type for glTexImage2D() in videoGL.h 
					   TEXTURE_SIZE_256,	// sizeX for glTexImage2D() in videoGL.h
					   TEXTURE_SIZE_256,	// sizeY for glTexImage2D() in videoGL.h
					   GL_TEXTURE_WRAP_S|GL_TEXTURE_WRAP_T|TEXGEN_OFF|GL_TEXTURE_COLOR0_TRANSPARENT, // param for glTexImage2D() in videoGL.h
					   (u8*)tilesBitmap		// image data generated by GRIT
					 );
	
	
	// Load palette of the tiles
	// We are using a #define auto-generated by GRIT
	// Can be found in the /build directory
	int TilesTexPal = gluTexLoadPal( tilesPal, tilesPalLen, GL_RGB256 );

	// Shuttle
	// Since the shuttle is just a single 64x64 image,
	// We use glLoadTileSet() giving the right dimensions.
	int ShuttleTextureID = 
		glLoadTileSet( Shuttle,			// pointer to glImage array
					   64,				// sprite width
					   64,				// sprite height
					   64,				// bitmap image width
					   64,				// bitmap image height
					   GL_RGB16,		// texture type for glTexImage2D() in videoGL.h
					   TEXTURE_SIZE_64,	// sizeX for glTexImage2D() in videoGL.h
					   TEXTURE_SIZE_64,	// sizeY for glTexImage2D() in videoGL.h
					   GL_TEXTURE_WRAP_S|GL_TEXTURE_WRAP_T|TEXGEN_OFF|GL_TEXTURE_COLOR0_TRANSPARENT,
					   (u8*)shuttleBitmap // image data generated by GRIT
					 );

	
	// Load our 16 color shuttle palette
	int ShuttleTexPal = gluTexLoadPal( shuttlePal, shuttlePalLen, GL_RGB16 );



	// Anya
	// This is a 16 bit image
	int AnyaTextureID = 
		glLoadTileSet( Anya,
					   128,
					   128,
					   128,
					   128,
					   GL_RGB,
					   TEXTURE_SIZE_128,
					   TEXTURE_SIZE_128,
					   GL_TEXTURE_WRAP_S|GL_TEXTURE_WRAP_T|TEXGEN_OFF,
					   (u8*)anyaBitmap
					 );


	// Print some console stuff
	
	iprintf("\x1b[1;1HEasy GL2D Sprites Demo");
	iprintf("\x1b[2;1HRelminator");
	iprintf("\x1b[4;1Hhttp://rel.betterwebber.com");
	
	iprintf("\x1b[6;1HA demo showing some sprite");
	iprintf("\x1b[7;1Hcapabilities of Easy GL2D");
	
	iprintf("\x1b[ 9;1HSprites by:");
	iprintf("\x1b[10;1HAdigun A. Polack, Patater,");
	iprintf("\x1b[11;1HCapcom and Anya Therese Lope");
	
	iprintf("\x1b[13;1HTextureIDs = %i, %i, %i, %i, %i", 
			EnemiesTextureID,
			ZeroTextureID,
			TilesTextureID,
			ShuttleTextureID,
			AnyaTextureID
		   );
	
	
	// calculate the amount of 
	// memory uploaded to VRAM in KB
	int TextureSize = enemiesBitmapLen +
					  zeroBitmapLen +
					  tilesBitmapLen +
					  shuttleBitmapLen +
					  anyaBitmapLen;
					  
					  
	iprintf("\x1b[15;1HTotal Texture size= %i kb", TextureSize / 1024);
	
	
	iprintf("\x1b[17;1HEnemies use a 256 color pal");
	iprintf("\x1b[18;1HZero uses a 256 color pal");
	iprintf("\x1b[19;1HTiles use a 256 color pal");
	iprintf("\x1b[20;1HShuttle uses a 16 color pal");
	iprintf("\x1b[21;1HAnya is a 16 bit image");
	
	
	// some variables for our demo
	int Frame = 0;				// just the standard frame counter
	int PhoenixFrame = 0;		// animation frame for our firebird
	int BeeFrame = 0;			// animation frame for the bee
	int ZeroFrame = 0;			// animation frame for zero
	int Rotation = 0;			// rotation value of the rotating sprites
	
	while( 1 ) 
	{
	
		Frame++;
		
		Rotation = Frame * 240;		// speed up our rotation
		
		// animate some of our animated sprites
		// every 8th frame
		if ( (Frame & 7) == 0 )
		{
			BeeFrame = (BeeFrame + 1) & 1;
			PhoenixFrame++;
			if (PhoenixFrame > 2) PhoenixFrame = 0;
			
		}

		// Faster zero animation
		if ( (Frame & 3) == 0 )
		{

			ZeroFrame++;
			if (ZeroFrame > 9) ZeroFrame = 0;
		}
		
		
		// calculate positions for our rotating sprites
		int x = 128 + ((cosLerp(Frame)+sinLerp(BRAD_PI+Rotation) * 100) >> 12);
		int y = 96 + ((cosLerp(Frame)+cosLerp(-Rotation) * 80) >> 12);
			
		
		
		// Start 2D mode
		glBegin2D();

			// Set our palette to our tiles (256 colors)
			// and draw our background
			glColorTable( GL_RGB256, TilesTexPal );
			DrawBG( Tiles );
			
			// Make the Anya's rotoscaled sprite translucent just for kicks
			// Use glSpriteRotateScaleXY() for some effect
			// Give it a polygon ID so that transluceny would work
			glPolyFmt(POLY_ALPHA(20) | POLY_CULL_NONE | POLY_ID(1));
			glSpriteRotateScaleXY( SCREEN_WIDTH/2, SCREEN_HEIGHT/2, Frame*140, sinLerp(Frame*120) * 3, sinLerp(Frame*210) * 2,  GL_FLIP_NONE, Anya );
			
			
			// Set our palette to the enemies spriteset (256 colors)
			glColorTable( GL_RGB256, EnemiesTexPal );
			
			// Draw our enemies
			// draw some rotated and/or animated sprites
			// Give  the other sprites different polygon IDs
			// so that translucency works
			glPolyFmt(POLY_ALPHA(20) | POLY_CULL_NONE | POLY_ID(2));
			glSpriteRotate(    x,     y,      Rotation,          GL_FLIP_NONE, &Enemies[30+BeeFrame]);
			glSpriteRotate(255-x, 191-y,  Rotation * 4,             GL_FLIP_H, &Enemies[84]);
			glSpriteRotate(255-x,     y,     -Rotation,             GL_FLIP_V, &Enemies[32]);
			glSpriteRotate(    x, 191-y, -Rotation * 3, GL_FLIP_H | GL_FLIP_V, &Enemies[81]);
			
			
			// Some phoenix enemies on the right
			// Note the flipmodes 
			// Also shows how we can draw in "color mode" and shadow mode
			glPolyFmt(POLY_ALPHA(20) | POLY_CULL_NONE | POLY_ID(3));
			glSprite(200, 0,  GL_FLIP_NONE,           &Enemies[87 + PhoenixFrame]);
			glColor( RGB15(31,0,0) );
			glSprite(200, 30,  GL_FLIP_H,              &Enemies[87 + PhoenixFrame]);
			
			// Make the last two sprites translucent
			glPolyFmt(POLY_ALPHA(20) | POLY_CULL_NONE | POLY_ID(4));
			glColor( RGB15(0,31,20) );
			glSprite(200, 60,  GL_FLIP_V,              &Enemies[87 + PhoenixFrame]);
			glColor( RGB15(0,0,0) );
			glSprite(200, 90, GL_FLIP_V | GL_FLIP_H , &Enemies[87 + PhoenixFrame]);
			
			//Restore color and translucency to normal 
			glColor( RGB15(31,31,31) );
			glPolyFmt(POLY_ALPHA(31) | POLY_CULL_NONE | POLY_ID(5));
			
			
			// Set palette to shuttle's palette (16 colors)
			// "Clean Stretch" the sprite
			// Useful for lasers and some effects
			glColorTable( GL_RGB16, ShuttleTexPal );
			glSpriteStretchHorizontal( 0, 135, 64 + (abs(sinLerp(Frame*100) * 200) >> 12), Shuttle );
			
			glColorTable( GL_RGB256, hitTexPal );
			
			// Use the enemies palette since zero share the same palette
			//glColorTable( GL_RGB256, EnemiesTexPal );
			glSprite( 0, 42*0, GL_FLIP_NONE, &Zero[ZeroFrame] );
		
			// Draw a horizontally  flipped "disco" zero
			// Disco fx is done with glColor
			int color = (Frame*4) & 31;
			glColor( RGB15(color, 31-color, 16+color*2) );
			glSprite( 0, 42*1, GL_FLIP_H, &Zero[ZeroFrame] );
			
			
			// restore pal to enemies
			glColorTable( GL_RGB256, EnemiesTexPal );
			glColor( RGB15(31-color, 16 + color*2, color) );
			glSprite( 0, 42*2, GL_FLIP_V, &Zero[ZeroFrame] );
			
			// Normalize color
			glColor( RGB15(31, 31, 31) );
			glSprite( 0, 42*3, GL_FLIP_V |GL_FLIP_H, &Zero[ZeroFrame] );
			
			
		glEnd2D();

		
		
		glFlush( 0 );

		swiWaitForVBlank();
	
		
	}

	return 0;


}//end main 


// Draws the background
void DrawBG( glImage *images )
{

	int x, y, i;
	
	for( y = 0; y < 256 / 16; y++ )
	{
		for( x = 0; x < 256 / 16; x++ )
		{
			i = y * 16 + x;
			glSprite( x * 16, y * 16, GL_FLIP_NONE, &images[i & 255] );
		}
	}
	
	
}