Graphics/3D/Display_List/source/main.cpp

#include <nds.h>


//display list
u32 triangle[] = 
{
    12,
    FIFO_COMMAND_PACK(FIFO_BEGIN, FIFO_COLOR, FIFO_VERTEX16, FIFO_COLOR),
    GL_TRIANGLE,
    RGB15(31,0,0),
    VERTEX_PACK(inttov16(-1),inttov16(-1)), VERTEX_PACK(0,0),
    RGB15(0,31,0),
    FIFO_COMMAND_PACK(FIFO_VERTEX16, FIFO_COLOR, FIFO_VERTEX16, FIFO_END),
    VERTEX_PACK(inttov16(1),inttov16(-1)), VERTEX_PACK(0,0),
    RGB15(0,0,31),
    VERTEX_PACK(inttov16(0),inttov16(1)), VERTEX_PACK(0,0),
};

int main()
{   
    
    float rotateX = 0.0;
    float rotateY = 0.0;
    
    //set mode 0, enable BG0 and set it to 3D
    videoSetMode(MODE_0_3D);
    
    // initialize gl
    glInit();
    
    // enable antialiasing
    glEnable(GL_ANTIALIAS);
    
    // setup the rear plane
    glClearColor(0,0,0,31); // BG must be opaque for AA to work
    glClearPolyID(63); // BG must have a unique polygon ID for AA to work
    glClearDepth(0x7FFF);
    
    //this should work the same as the normal gl call
    glViewport(0,0,255,191);
    
    
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(70, 256.0 / 192.0, 0.1, 40);
    
    gluLookAt(  0.0, 0.0, 1.0,      //camera possition 
                0.0, 0.0, 0.0,      //look at
                0.0, 1.0, 0.0);     //up
    
    while(1)        
    {
        glPushMatrix();
        
        //move it away from the camera
        glTranslatef32(0, 0, floattof32(-1));
        
        glRotateX(rotateX);
        glRotateY(rotateY);
        
        glMatrixMode(GL_TEXTURE);
        glLoadIdentity();
        
        glMatrixMode(GL_MODELVIEW);
        
        
        //not a real gl function and will likely change
        glPolyFmt(POLY_ALPHA(31) | POLY_CULL_NONE);
        
        scanKeys();
        
        u16 keys = keysHeld();
        
        if((keys & KEY_UP)) rotateX += 3;
        if((keys & KEY_DOWN)) rotateX -= 3;
        if((keys & KEY_LEFT)) rotateY += 3;
        if((keys & KEY_RIGHT)) rotateY -= 3;
        
        glCallList(triangle);   
        
        glPopMatrix(1);
        
        glFlush(0);
        
    }
    
    return 0;
}//end main