NeHe Lesson 4 FeOS port

main.c

#include <feos.h>
#include <feos3d.h>

static void init3D()
{
	videoSetMode(MODE_0_3D);
	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);

	// Set our viewport to be the same size as the screen
	glViewport(0,0,255,191);
	
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	gluPerspective(70, 256.0 / 192.0, 0.1, 100);
	
	//ds specific, several attributes can be set here	
	glPolyFmt(POLY_ALPHA(31) | POLY_CULL_NONE);
	
	// Set the current matrix to be the model matrix
	glMatrixMode(GL_MODELVIEW);
}

static void drawScene();

int rtri, rquad;

int main()
{
	FeOS_DirectMode();
	init3D();

	for(;;)
	{
		swiWaitForVBlank();
		if (keysDown() & KEY_START) break;

		drawScene();
		glFlush(0);
	}

	glDeinit();
	FeOS_ConsoleMode();

	return 0;
}

#define deg2ang(x) ((int)(degreesToAngle(x)))

void drawScene()
{
	/*ds does this automagicaly*///glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);	// Clear Screen And Depth Buffer
	glLoadIdentity();									// Reset The Current Modelview Matrix
	glTranslatef(-1.5f,0.0f,-6.0f);						// Move Left 1.5 Units And Into The Screen 6.0
	glRotatef32i(rtri,floattof32(0.0f),floattof32(1.0f),floattof32(0.0f));						// Rotate The Triangle On The Y axis ( NEW )
	glColor3f(1, 1, 1);									// set the vertex color
	glBegin(GL_TRIANGLES);								// Start Drawing A Triangle
		glColor3f(1.0f,0.0f,0.0f);						// Set Top Point Of Triangle To Red
		glVertex3f( 0.0f, 1.0f, 0.0f);					// First Point Of The Triangle
		glColor3f(0.0f,1.0f,0.0f);						// Set Left Point Of Triangle To Green
		glVertex3f(-1.0f,-1.0f, 0.0f);					// Second Point Of The Triangle
		glColor3f(0.0f,0.0f,1.0f);						// Set Right Point Of Triangle To Blue
		glVertex3f( 1.0f,-1.0f, 0.0f);					// Third Point Of The Triangle
	glEnd();											// Done Drawing The Triangle
	glLoadIdentity();									// Reset The Current Modelview Matrix
	glTranslatef(1.5f,0.0f,-6.0f);						// Move Right 1.5 Units And Into The Screen 6.0
	glRotatef32i(rquad,floattof32(1.0f),floattof32(0.0f),floattof32(0.0f));					// Rotate The Quad On The X axis ( NEW )
	glColor3f(0.5f,0.5f,1.0f);							// Set The Color To Blue One Time Only
	glBegin(GL_QUADS);									// Draw A Quad
		glVertex3f(-1.0f, 1.0f, 0.0f);					// Top Left
		glVertex3f( 1.0f, 1.0f, 0.0f);					// Top Right
		glVertex3f( 1.0f,-1.0f, 0.0f);					// Bottom Right
		glVertex3f(-1.0f,-1.0f, 0.0f);					// Bottom Left
	glEnd();											// Done Drawing The Quad
	rtri+=deg2ang(0.9f);											// Increase The Rotation Variable For The Triangle ( NEW )
	rquad-=deg2ang(0.75f);										// Decrease The Rotation Variable For The Quad ( NEW )
}