From 1aa0e17df7c325a41de8cf8a57f52ed853f08bf3 Mon Sep 17 00:00:00 2001
From: "John Wilbert M. Villamor" <lameguy64@gmail.com>
Date: Fri, 24 Apr 2020 19:01:28 +0800
Subject: Refined toolchain instructions, organized examples, added automatic
 retry for CdRead(), added FIOCSCAN ioctl in psxsio TTY driver, added tty and
 console examples.

---
 examples/graphics/balls/main.c | 228 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 228 insertions(+)
 create mode 100644 examples/graphics/balls/main.c

(limited to 'examples/graphics/balls/main.c')

diff --git a/examples/graphics/balls/main.c b/examples/graphics/balls/main.c
new file mode 100644
index 0000000..89c8063
--- /dev/null
+++ b/examples/graphics/balls/main.c
@@ -0,0 +1,228 @@
+/* 
+ * LibPSn00b Example Programs
+ *
+ * Balls Example
+ * 2019 Meido-Tek Productions / PSn00bSDK Project
+ *
+ * Draws a bunch of ball sprites that bounce around the screen,
+ * along with a ball snake that might be difficult to see.
+ *
+ *
+ * Example by Lameguy64
+ *
+ * Changelog:
+ *
+ *  November 20, 2018 - Initial version.
+ *
+ */
+ 
+#include <stdio.h>
+#include <stdlib.h>
+#include <psxetc.h>
+#include <psxgte.h>
+#include <psxgpu.h>
+#include "ball16c.h"
+
+
+#define MAX_BALLS 1024
+
+#define OT_LEN 		8
+
+#define SCREEN_XRES	640
+#define SCREEN_YRES	480
+
+#define CENTER_X	SCREEN_XRES/2
+#define CENTER_Y	SCREEN_YRES/2
+
+
+/* Display and drawing environments */
+DISPENV disp;
+DRAWENV draw;
+
+char pribuff[2][65536];			/* Primitive packet buffers */
+unsigned int ot[2][OT_LEN];		/* Ordering tables */
+char *nextpri;					/* Pointer to next packet buffer offset */
+int db = 0;						/* Double buffer index */
+
+
+/* Ball struct and array */
+typedef struct {
+	short x,y;
+	short xdir,ydir;
+	unsigned char r,g,b,p;
+} BALL_TYPE;
+
+BALL_TYPE balls[MAX_BALLS];
+
+
+/* TIM image parameters for loading the ball texture and drawing sprites */
+TIM_IMAGE tim;
+
+
+void init() {
+	
+	int i;
+	
+	/* Reset GPU (also installs event handler for VSync) */
+	printf("Init GPU... ");
+	ResetGraph( 0 );
+	printf("Done.\n");
+	
+	
+	printf("Set video mode... ");
+	
+	/* Set display and draw environment parameters */
+	SetDefDispEnv( &disp, 0, 0, SCREEN_XRES, SCREEN_YRES );
+	SetDefDrawEnv( &draw, 0, 0, SCREEN_XRES, SCREEN_YRES );
+	disp.isinter = 1; /* Enable interlace (required for hires) */
+	
+	/* Set clear color, area clear and dither processing */
+	setRGB0( &draw, 63, 0, 127 );
+	draw.isbg = 1;
+	draw.dtd = 1;
+	
+	/* Apply the display and drawing environments */
+	PutDispEnv( &disp );
+	PutDrawEnv( &draw );
+	
+	/* Enable video output */
+	SetDispMask( 1 );
+	
+	printf("Done.\n");
+	
+	
+	/* Upload the ball texture */
+	printf("Upload texture... ");
+	GetTimInfo( (unsigned int*)ball16c, &tim ); /* Get TIM parameters */
+	
+	LoadImage( tim.prect, tim.paddr );		/* Upload texture to VRAM */
+	if( tim.mode & 0x8 ) {
+		LoadImage( tim.crect, tim.caddr );	/* Upload CLUT if present */
+	}
+	
+	printf("Done.\n");
+	
+	
+	/* Calculate ball positions */
+	printf("Calculating balls... ");
+	
+	for(i=0; i<MAX_BALLS; i++) {
+		
+		balls[i].x = (rand()%624);
+		balls[i].y = (rand()%464);
+		balls[i].xdir = 1-(rand()%3);
+		balls[i].ydir = 1-(rand()%3);
+		if( !balls[i].xdir ) balls[i].xdir = 1;
+		if( !balls[i].ydir ) balls[i].ydir = 1;
+		balls[i].xdir *= 2;
+		balls[i].ydir *= 2;
+		balls[i].r = (rand()%256);
+		balls[i].g = (rand()%256);
+		balls[i].b = (rand()%256);
+		
+	}
+	
+	printf("Done.\n");
+	
+}
+
+int main(int argc, const char* argv[]) {
+	
+	SPRT_16 *sprt;
+	DR_TPAGE *tpri;
+	
+	int i,counter=0;
+	
+	
+	/* Init graphics and stuff before doing anything else */
+	init();
+	
+	
+	/* Main loop */
+	printf("Entering loop...\n");
+	
+	while(1) {
+		
+		/* Clear ordering table and set start address of primitive */
+		/* buffer for next frame */
+		ClearOTagR( ot[db], OT_LEN );
+		nextpri = pribuff[db];
+		
+		/* Sort a balls snake */
+		sprt = (SPRT_16*)nextpri;
+		srand( 64 );
+		for( i=0; i<32; i++ ) {
+		
+			setSprt16( sprt );
+			setXY0( sprt, 
+				(CENTER_X-8)+(isin((counter-(i<<4))<<3)>>5), 
+				(CENTER_Y-8)-(icos((counter-(i<<2))<<3)>>5) );
+			setRGB0( sprt, rand()%256, rand()%256, rand()%256 );
+			setUV0( sprt, 0, 0 );
+			setClut( sprt, tim.crect->x, tim.crect->y );
+			
+			addPrim( ot[db]+(OT_LEN-1), sprt );
+			sprt++;
+		
+		}
+		
+		/* Sort the balls */
+		for( i=0; i<MAX_BALLS; i++ ) {
+			
+			setSprt16( sprt );
+			setXY0( sprt, balls[i].x, balls[i].y );
+			setRGB0( sprt, balls[i].r, balls[i].g, balls[i].b );
+			setUV0( sprt, 0, 0 );
+			setClut( sprt, tim.crect->x, tim.crect->y );
+			
+			addPrim( ot[db]+(OT_LEN-1), sprt );
+			sprt++;
+			
+			balls[i].x += balls[i].xdir;
+			balls[i].y += balls[i].ydir;
+			
+			if( ( balls[i].x+16 ) > 640 ) {
+				balls[i].xdir = -2;
+			} else if( balls[i].x < 0 ) {
+				balls[i].xdir = 2;
+			}
+			
+			if( ( balls[i].y+16 ) > 480 ) {
+				balls[i].ydir = -2;
+			} else if( balls[i].y < 0 ) {
+				balls[i].ydir = 2;
+			}
+			
+		}
+		nextpri = (char*)sprt;
+		
+		
+		/* Sort a TPage primitive so the sprites will draw pixels from */
+		/* the correct texture page in VRAM */
+		tpri = (DR_TPAGE*)nextpri;
+		setDrawTPage( tpri, 0, 0, 
+			getTPage(0, 0, tim.prect->x, tim.prect->y ));
+		addPrim( ot[db]+(OT_LEN-1), tpri );
+		nextpri += sizeof(DR_TPAGE);
+		
+		/* Wait for GPU and VSync */
+		DrawSync( 0 );
+		VSync( 0 );
+		
+		/* Since draw.isbg is non-zero this clears the screen */
+		PutDrawEnv( &draw );
+		
+		/* Begin drawing the new frame */
+		DrawOTag( ot[db]+(OT_LEN-1) );
+		
+		/* Alternate to the next buffer */
+		db = !db;
+		
+		/* Increment counter for the snake animation */
+		counter++;
+		
+	}
+		
+	return 0;
+
+}
-- 
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