From 3506d3df9f2e929def5b1662e08481d28643358f Mon Sep 17 00:00:00 2001
From: Jon Bergli Heier <snakebite@jvnv.net>
Date: Mon, 17 May 2010 16:34:05 +0200
Subject: Added stride and colors to BulletPattern.

---
 bulletpattern.cpp |  7 ++++---
 bulletpattern.h   |  3 +++
 main.cpp          | 52 +++++++++++++++++++++++++++++++++++++++++++++++-----
 3 files changed, 54 insertions(+), 8 deletions(-)

diff --git a/bulletpattern.cpp b/bulletpattern.cpp
index 1e8da5e..a2504f9 100644
--- a/bulletpattern.cpp
+++ b/bulletpattern.cpp
@@ -7,7 +7,8 @@
 #include "bulletpattern.h"
 
 BulletPattern::BulletPattern() {
-	num_bullets = 0;
+	num_bullets = stride = color_g = color_b = 0;
+	color_r = 1;
 	bullets = new float[2048];
 	
 	int k = 0;
@@ -33,10 +34,10 @@ void BulletPattern::update(unsigned int time, unsigned int step) {
 void BulletPattern::draw() {
 	glEnableClientState(GL_VERTEX_ARRAY);
 	
-	glVertexPointer(4, GL_FLOAT, 4 * sizeof(float), bullets);
+	glVertexPointer(4, GL_FLOAT, 4 * sizeof(float) + stride, bullets);
 	
 	glDrawArrays(GL_POINTS, 0, num_bullets);
 	
 	glDisableClientState(GL_VERTEX_ARRAY);
 	
-}
\ No newline at end of file
+}
diff --git a/bulletpattern.h b/bulletpattern.h
index dffb928..092713e 100644
--- a/bulletpattern.h
+++ b/bulletpattern.h
@@ -5,7 +5,10 @@ class BulletPattern {
 	protected:
 		float* bullets;
 		int num_bullets;
+		int stride;
 	public:
+		float color_r, color_g, color_b;
+
 		BulletPattern();
 		virtual void update(unsigned int time, unsigned int step);
 		void draw();
diff --git a/main.cpp b/main.cpp
index 7248393..998adf0 100644
--- a/main.cpp
+++ b/main.cpp
@@ -20,11 +20,16 @@
 #include "bullet.h"
 #include "bulletpattern.h"
 
+const int width = 1280, height = 720;
+
 class BulletPattern1 : public BulletPattern {
 	unsigned int base;
 	public:
 		BulletPattern1(bool reverse, unsigned int base) {
 			num_bullets = 0;
+			color_r = 1;
+			color_g = 0;
+			color_b = 1;
 			bullets = new float[128];
 			this->base = base;
 
@@ -39,6 +44,7 @@ class BulletPattern1 : public BulletPattern {
 		void update(unsigned int time, unsigned int step) {
 			if(num_bullets < 32 && base + num_bullets * 10 < time) {
 				num_bullets += time / 10 - num_bullets - base / 10;
+				if(num_bullets > 32) num_bullets = 32;
 			}
 			for(int i = 0; i < num_bullets; i++) {
 				bullets[i*4] += bullets[i*4 + 2] * step;
@@ -47,10 +53,41 @@ class BulletPattern1 : public BulletPattern {
 		}
 };
 
+class BulletPattern2 : public BulletPattern {
+	public:
+		BulletPattern2(bool reverse, unsigned int base) {
+			num_bullets = 0;
+			color_r = 0;
+			color_g = 1;
+			color_b = 0;
+			stride = sizeof(float);
+			bullets = new float[32*5];
+
+				int j = 0;
+				for(float i = 0; i < M_PI; i += 0.1, j++) {
+					bullets[j*5] = 50.0 + sinf(!reverse ? M_PI_2 + i : M_PI - i + M_PI_2) * 9;
+					bullets[j*5 + 1] = 80 + cosf(M_PI_2 + i) * 10;
+					bullets[j*5 + 2] = sinf(!reverse ? M_PI_2 + i : M_PI - i + M_PI_2) / 150.0;
+					bullets[j*5 + 3] = -0.01;
+					bullets[j*5 + 4] = base + i * 100;
+				}
+
+		};
+		void update(unsigned int time, unsigned int step) {
+			while(num_bullets < 32 && (unsigned int)(bullets[num_bullets*5 + 4]) < time) {
+				num_bullets++;
+			}
+			for(int i = 0; i < num_bullets; i++) {
+				bullets[i*5] += bullets[i*5 + 2] * step;
+				bullets[i*5 + 1] += bullets[i*5 + 3] * step;
+			}
+		}
+};
+
 bool fullscreen = false;
 void toggle_fullscreen() {
 	fullscreen = !fullscreen;
-	SDL_SetVideoMode(640, 480, 0, SDL_OPENGL | SDL_GL_DOUBLEBUFFER | SDL_HWPALETTE | SDL_HWSURFACE | (fullscreen ? SDL_FULLSCREEN : 0));
+	SDL_SetVideoMode(width, height, 0, SDL_OPENGL | SDL_GL_DOUBLEBUFFER | SDL_HWPALETTE | SDL_HWSURFACE | (fullscreen ? SDL_FULLSCREEN : 0));
 }
 
 int main(int, char**) {
@@ -59,7 +96,7 @@ int main(int, char**) {
 		return 1;
 	}
 
-	SDL_Surface *surface = SDL_SetVideoMode(640, 480, 0, SDL_OPENGL | SDL_GL_DOUBLEBUFFER | SDL_HWPALETTE | SDL_HWSURFACE);
+	SDL_Surface *surface = SDL_SetVideoMode(width, height, 0, SDL_OPENGL | SDL_GL_DOUBLEBUFFER | SDL_HWPALETTE | SDL_HWSURFACE);
 	if(surface == NULL) {
 		fprintf(stderr, "Failed to set video mode: %s\n", SDL_GetError());
 		return 1;
@@ -92,7 +129,10 @@ int main(int, char**) {
 	
 	patterns.push_back(new BulletPattern());
 	for(int i = 0; i < 8; i++) {
-		patterns.push_back(new BulletPattern1(i % 2 == 1, i * 400));
+		patterns.push_back(new BulletPattern1(i % 2 == 1, 5000 + i * 400));
+	}
+	for(int i = 0; i < 8; i++) {
+		patterns.push_back(new BulletPattern2(i % 2 == 1, 9000 + i * 400));
 	}
 
 	TextureSDL texture1("foo.png");
@@ -143,7 +183,7 @@ int main(int, char**) {
 
 		glMatrixMode(GL_PROJECTION);
 		glLoadIdentity();
-		gluPerspective(45, 640. / 480., 1, 100);
+		gluPerspective(45, (float)width / (float)height, 1, 100);
 
 		glMatrixMode(GL_MODELVIEW);
 		glLoadIdentity();
@@ -196,7 +236,9 @@ int main(int, char**) {
 		glColor4f(1, 0, 0, 1);
 		
 		for(std::vector<BulletPattern*>::iterator it = patterns.begin(); it < patterns.end(); it++) {
-			(*it)->draw();
+			BulletPattern *bp = (*it);
+			glColor3f(bp->color_r, bp->color_g, bp->color_b);
+			bp->draw();
 		}
 		
 		glDisable(GL_TEXTURE_2D);
-- 
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