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-rw-r--r--engine/bulletpattern.cpp43
1 files changed, 43 insertions, 0 deletions
diff --git a/engine/bulletpattern.cpp b/engine/bulletpattern.cpp
new file mode 100644
index 0000000..b4b5a31
--- /dev/null
+++ b/engine/bulletpattern.cpp
@@ -0,0 +1,43 @@
+#ifndef __APPLE__
+#include <GL/gl.h>
+#else
+#include <OpenGL/gl.h>
+#endif
+#include <cmath>
+#include "bulletpattern.h"
+
+BulletPattern::BulletPattern() {
+ num_bullets = stride = color_g = color_b = 0;
+ color_r = 1;
+ bullets = new float[2048];
+
+ int k = 0;
+
+ for(float i = 0; i < M_PI * 16; i += 0.1) {
+ bullets[k++] = 0.5 + cosf(i) * 0.05;
+ bullets[k++] = 0.5 + sinf(i) * 0.05;
+ bullets[k++] = cosf(i) / 10000.0;
+ bullets[k++] = sinf(i) / 10000.0;
+ }
+}
+
+void BulletPattern::update(unsigned int time, unsigned int step) {
+ while(num_bullets < 503 && num_bullets * 4 < time) {
+ num_bullets++;
+ }
+ for(int i = 0; i < num_bullets; i++) {
+ bullets[i*4] += bullets[i*4 + 2] * step;
+ bullets[i*4 + 1] += bullets[i*4 + 3] * step;
+ }
+}
+
+void BulletPattern::draw() {
+ glEnableClientState(GL_VERTEX_ARRAY);
+
+ glVertexPointer(4, GL_FLOAT, 4 * sizeof(float) + stride, bullets);
+
+ glDrawArrays(GL_POINTS, 0, num_bullets);
+
+ glDisableClientState(GL_VERTEX_ARRAY);
+
+}