From 6a2ef03d88a1757ce778f6aa943bd928f4a7b27c Mon Sep 17 00:00:00 2001
From: Matt Turner <mattst88@gmail.com>
Date: Fri, 4 Aug 2006 02:53:49 +0000
Subject: Basic bouncing ball, rectangle outline of bounds

git-svn-id: svn://mattst88.com/svn/glpong3d/trunk@4 4dd1920e-271a-0410-bca0-81b404a81564
---
 glpong3d.c | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 73 insertions(+), 12 deletions(-)

diff --git a/glpong3d.c b/glpong3d.c
index bb0729a..b9a5d29 100644
--- a/glpong3d.c
+++ b/glpong3d.c
@@ -17,7 +17,7 @@ int main(int argc, char * argv[]) {
 	
 	while ( !GLPong.done ) {
 		GLPong_HandleEvents();
-	/*	GLPong_Move();*/
+		GLPong_Move();
 		GLPong_Draw();
 		SDL_Delay(10);
 	}
@@ -32,15 +32,15 @@ void GLPong_Init() {
 	GLPong.done = 0;
 	
 	GLPong.w = 800;
-	GLPong.h = 600;
+	GLPong.h = 800;
 	
-	GLPong.Ball.w = 1.0f;
-	GLPong.Ball.h = 1.0f;
-	GLPong.Ball.x = -0.5f;
-	GLPong.Ball.y = -0.5f;
+	GLPong.Ball.w = 0.2f;
+	GLPong.Ball.h = 0.2f;
+	GLPong.Ball.x = -0.1f;
+	GLPong.Ball.y = -0.1f;
 	GLPong.Ball.z = -3.0f;
-	GLPong.Ball.xv = 0.0f;
-	GLPong.Ball.yv = 0.0f;
+	GLPong.Ball.xv = 0.02f;
+	GLPong.Ball.yv = 0.01f;
 	GLPong.Ball.zv = -0.05f;
 	
 	SDL_Init(SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE);
@@ -122,10 +122,58 @@ void GLPong_HandleEvents() {
 
 void GLPong_Draw() {
 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+	glLoadIdentity();
+	glColor3f(0.0f, 1.0f, 0.0f);
+	glTranslatef(0.0f, 0.0f, 0.0f);
+	glBegin(GL_LINE_LOOP);
+		glVertex3f(-1.0f, -1.0f, -3.0f); /* Lower Left */
+		glVertex3f( 1.0f, -1.0f, -3.0f); /* Lower Right */
+		glVertex3f( 1.0f,  1.0f, -3.0f); /* Upper Right */
+		glVertex3f(-1.0f,  1.0f, -3.0f); /* Upper Left */
+	glEnd();
+	
+	glLoadIdentity();
+	glTranslatef(0.0f, 0.0f, 0.0f);
+	glBegin(GL_LINE_LOOP);
+		glVertex3f(-1.0f, -1.0f, -9.0f); /* Lower Left */
+		glVertex3f( 1.0f, -1.0f, -9.0f); /* Lower Right */
+		glVertex3f( 1.0f,  1.0f, -9.0f); /* Upper Right */
+		glVertex3f(-1.0f,  1.0f, -9.0f); /* Upper Left */
+	glEnd();
+	
+	glLoadIdentity();
+	glTranslatef(0.0f, 0.0f, 0.0f);
+	glBegin(GL_LINES);
+		glVertex3f(-1.0f, -1.0f, -3.0f); /* Lower Left */
+		glVertex3f(-1.0f, -1.0f, -9.0f);
+	glEnd();
+	
+	glLoadIdentity();
+	glTranslatef(0.0f, 0.0f, 0.0f);
+	glBegin(GL_LINES);
+		glVertex3f( 1.0f, -1.0f, -3.0f); /* Lower Right */
+		glVertex3f( 1.0f, -1.0f, -9.0f);
+	glEnd();
+	
+	glLoadIdentity();
+	glTranslatef(0.0f, 0.0f, 0.0f);
+	glBegin(GL_LINES);
+		glVertex3f( 1.0f,  1.0f, -3.0f); /* Upper Right */
+		glVertex3f( 1.0f,  1.0f, -9.0f);
+	glEnd();
 	
+	glLoadIdentity();
+	glTranslatef(0.0f, 0.0f, 0.0f);
+	glBegin(GL_LINES);
+		glVertex3f(-1.0f,  1.0f, -3.0f); /* Upper Left */
+		glVertex3f(-1.0f,  1.0f, -9.0f);
+	glEnd();
+	
+	glLoadIdentity();
 	glBindTexture(GL_TEXTURE_2D, ball_texture);
 	glEnable(GL_TEXTURE_2D);
-	glLoadIdentity();
+	glColor3f(1.0f, 1.0f, 1.0f);
 	glTranslatef(GLPong.Ball.x, GLPong.Ball.y, GLPong.Ball.z);
 	glBegin(GL_QUADS);
 		glTexCoord2f(0.0f, 1.0f); glVertex2f(GLPong.Ball.w, GLPong.Ball.h);	/* Lower Left */
@@ -135,6 +183,15 @@ void GLPong_Draw() {
 	glEnd();
 	glDisable(GL_TEXTURE_2D);
 	
+	glLoadIdentity();
+	glTranslatef(0.0f, 0.0f, GLPong.Ball.z);
+	glBegin(GL_LINE_LOOP);
+		glVertex3f(-1.0f, -1.0f, 0.0f); /* Lower Left */
+		glVertex3f( 1.0f, -1.0f, 0.0f); /* Lower Right */
+		glVertex3f( 1.0f,  1.0f, 0.0f); /* Upper Right */
+		glVertex3f(-1.0f,  1.0f, 0.0f); /* Upper Left */
+	glEnd();
+	
 	SDL_GL_SwapBuffers();
 }
 
@@ -146,9 +203,13 @@ void GLPong_Move() {
 	GLPong.Ball.x += GLPong.Ball.xv;
 	GLPong.Ball.y += GLPong.Ball.yv;
 	GLPong.Ball.z += GLPong.Ball.zv;
-	if (GLPong.Ball.z < -12.0f) {
-		GLPong.Ball.zv = -GLPong.Ball.zv;
-	} else if (GLPong.Ball.z > -3.0f) {
+	if ((GLPong.Ball.x > 1.0f) || (GLPong.Ball.x < -1.0f)) {
+		GLPong.Ball.xv = -GLPong.Ball.xv;
+	}
+	if ((GLPong.Ball.y > 1.0f) || (GLPong.Ball.y < -1.0f)) {
+		GLPong.Ball.yv = -GLPong.Ball.yv;
+	}
+	if ((GLPong.Ball.z < -9.0f) || (GLPong.Ball.z > -3.0f)) {
 		GLPong.Ball.zv = -GLPong.Ball.zv;
 	}
 }
-- 
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