Renamed bullets header to simply ConstantVelocity

1 files changed, 42 insertions, 0 deletions

diff --git a/ConstantVelocity.cpp b/ConstantVelocity.cpp
new file mode 100644
index 0000000..37f3c3d
--- /dev/null
+++ b/ConstantVelocity.cpp
@@ -0,0 +1,42 @@
+#include "ConstantVelocity.h"
+
+#include <raylib.h>
+
+
+ConstantVelocitySystem::ConstantVelocitySystem() :
+    ConstantVelocitySystem(10000)
+{
+}
+
+
+ConstantVelocitySystem::ConstantVelocitySystem(int reserved)
+{
+    m_bullets.reserve(reserved);
+}
+
+
+void
+ConstantVelocitySystem::update(const float dt)
+{
+    const int max_height = GetScreenHeight() + MARGIN;
+    const int min_width = 0 - MARGIN;
+    const int max_width = GetScreenWidth() + MARGIN;
+    auto it = m_bullets.begin();
+    while (it != m_bullets.end()) {
+        auto& bullet = *it;
+        bullet.position.x += bullet.velocity.x * dt;
+        bullet.position.y += bullet.velocity.y * dt;
+        if (bullet.position.y > max_height || bullet.position.x < min_width || bullet.position.x > max_width)
+            it = m_bullets.erase(it);
+        else
+            ++it;
+    }
+}
+
+
+void
+ConstantVelocitySystem::draw()
+{
+    for (const auto& bullet : m_bullets)
+        DrawCircle(bullet.position.x, bullet.position.y, bullet.radius, bullet.color);
+}