Added BulletPattern4.

1 files changed, 33 insertions, 0 deletions

diff --git a/engine/bulletpattern.cpp b/engine/bulletpattern.cpp
index 195caf9..6ed4322 100644
--- a/engine/bulletpattern.cpp
+++ b/engine/bulletpattern.cpp
@@ -1,5 +1,6 @@
 #include <cmath>
 #include "bulletpattern.h"
+#include "matrix.h"
 
 BulletPattern1::BulletPattern1(const Vector2& initpos) {
 	num_bullets = steps = 0;
@@ -86,3 +87,35 @@ void BulletPattern3::update() {
 		bullets[i].pos += bullets[i].dir;
 	}
 }
+
+BulletPattern4::BulletPattern4(const Vector2& initpos) {
+	num_bullets = steps = 0;
+	color_r = 1.0;
+	color_g = 1.0;
+	color_b = 0.0;
+	bullets = new Bullet[24*16];
+	
+	int k = 0;
+	for(int j = 0; j < 24; j++) {
+		for(float i = 0; i < 2 * M_PI; i += 0.4, k++) {
+			bullets[k].pos = initpos;
+			bullets[k].dir.x = cosf(i) / 40;
+			bullets[k].dir.y = sinf(i) / 40;
+			bullets[k].data.a = j * 10;
+			bullets[k].data.b = i;
+		}
+	}
+};
+
+void BulletPattern4::update() {
+	steps++;
+	while(num_bullets < 384 && (unsigned int)(bullets[num_bullets].data.a) < steps) {
+		num_bullets++;
+	}
+	for(int i = 0; i < num_bullets; i++) {
+		float l = log1pf((steps - bullets[i].data.a));
+		Matrix2 m = rotation_matrix(l);
+		bullets[i].dir = m * bullets[i].dir;
+		bullets[i].pos += bullets[i].dir;
+	}
+}