Initial commit

src/ring.cpp

@@ -0,0 +1,112 @@
+#include "SDL_opengl.h"
+
+#include <AL/al.h>
+#include <cmath>
+
+#include "antigrav.h"
+
+m3dMesh Ring::mesh;
+
+const float Ring::MAXLIFE = 1.0;
+Ring *Ring::rings;
+int Ring::numRings;
+
+int Ring::init()
+{
+    if(mesh.loadFromXML("ring.xml"))
+        return 1;
+
+    rings = new Ring[MAXRINGS];
+    if(!rings)
+        return 1;
+    return 0;
+}
+
+Ring::Ring()
+    : life(0)
+{
+}
+
+Ring::Ring(float x, float y, float ang, const Vector2& vel, const float col[3])
+{
+    posx = x;
+    posy = y;
+    velx = vel.getX();
+    vely = vel.getY();
+    life = MAXLIFE;
+    angle = DEG(ang);
+
+    color[0] = col[0];
+    color[1] = col[1];
+    color[2] = col[2];
+    color[3] = 1;
+}
+
+void Ring::update(float t)
+{
+    if(isAlive()) {
+        posx += velx * t;
+        posy += vely * t;
+        life -= t;
+        if(life<0)
+            color[3]=0;
+        else
+            color[3] = life/MAXLIFE;
+    }
+}
+
+void Ring::draw()
+{
+    glPushMatrix();
+    glColor4fv(color);
+    glTranslatef(posx,posy,0);
+    glRotatef(angle,0,0,1);
+    glScalef(7,7,7);
+    mesh.draw();
+    glPopMatrix();
+}
+
+bool Ring::isAlive() const
+{
+    return life>0;
+}
+
+void Ring::updateAll(float t)
+{
+    for(int i=0;i<MAXRINGS;++i) {
+        if(rings[i].isAlive()) {
+            rings[i].update(t);
+        }
+    }
+}
+
+void Ring::drawAll() {
+    glEnable(GL_BLEND);
+    glDisable(GL_LIGHTING);
+    glBlendFunc(GL_SRC_ALPHA,GL_ONE);
+    for(int i=0;i<MAXRINGS;++i) {
+        if(rings[i].isAlive()) {
+            rings[i].draw();
+        }
+    }
+    glDisable(GL_BLEND);
+    glEnable(GL_LIGHTING);
+    glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
+}
+
+void Ring::addRing(const Ring& ring)
+{
+    for(int i=0;i<MAXRINGS;++i) {
+        if(rings[i].isAlive()==false) {
+            rings[i] = ring;
+            break;
+        }
+    }
+}
+
+void Ring::resetAll()
+{
+    for(int i=0;i<MAXRINGS;++i)
+        rings[i] = Ring();
+}
+