Diff: GameObject.cpp

Revision:

0:89d0cb201659

diff -r 000000000000 -r 89d0cb201659 GameObject.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/GameObject.cpp	Wed Oct 10 08:00:57 2018 +0000
@@ -0,0 +1,135 @@
+#include "Pokitto.h"
+#include "GameObject.h"
+
+Pokitto::Display gobj_d;
+int flipper = 0;
+
+
+GameObject::GameObject() {
+    x = random(-20,20);
+    y = random(-15,15);
+    vx = 0;//random(-100,100)/100.0f;
+    vy = 0;//random(-100,100)/100.0f;
+    width = 5;
+    height = 5; 
+    if (flipper) color = 7; //random(3,12);
+    else color = 4;
+    flipper = 1 - flipper;
+    if (color == 5) color = 2;
+    orig_color = color;
+    bounce = 0.9f;
+    acceleration = 0.15f;
+    friction = 0.98f; 
+    mass = 1.0f;   
+    centerX = 55+x;
+    centerY = 44+y;
+    movable=true; 
+    visible=true;
+    active=true;
+}
+
+void GameObject::draw() {
+    if (!visible) return;
+    gobj_d.setColor(color);
+    gobj_d.fillRect(55-width/2+x,44-height/2+y,width,height);  
+    centerX = 55+x;
+    centerY = 44+y;  
+}
+
+void GameObject::move() {
+    if (!active) return;
+    if (!movable) return;
+    x += vx;
+    y += vy;
+    centerX = 55+x;
+    centerY = 44+y;   
+    vx *= friction;
+    vy *= friction;
+    if (abs(vx*10) < 1 && abs(vy*10) <1) vx = vy = 0; // practically stopped
+}
+ 
+bool GameObject::isMoving() {
+    if (vx == 0 && vy == 0) return false;
+    return true;    
+} 
+
+void GameObject::remove() {
+    active=false;
+    visible=false;
+    vx = 0;
+    vy = 0;
+}
+ 
+void GameObject::moveX(float n) {
+    x += n;  
+    centerX = 55+x;  
+}
+     
+void GameObject::moveY(float n) {
+    y += n;    
+    centerY = 44+y;
+}    
+
+void GameObject::accelerateX(float a) {
+    vx += a*acceleration; 
+}
+
+void GameObject::accelerateY(float a) {
+    vy += a*acceleration; 
+}
+
+void GameObject::bounceY() {
+    vy = -vy * bounce; 
+}
+
+void GameObject::bounceX() {
+    vx = -vx * bounce; 
+}
+
+void GameObject::bounceY(float bouncefactor) {
+    vy = -vy * (bounce*bouncefactor); 
+}
+
+void GameObject::bounceX(float bouncefactor) {
+    vx = -vx * (bounce*bouncefactor); 
+}
+
+bool GameObject::checkCollision(GameObject& other) {
+    if (active == false || other.active == false) return false;
+    other.color = 2;
+    if ((x + width/2 >= other.x - other.width/2) && (x - width/2 < other.x + other.width/2) && (y + height/2 >= other.y - other.height/2) && (y - height/2 < other.y + other.height/2)) return true; 
+    other.color = other.orig_color;
+    return false;
+}
+
+void GameObject::doCollision(GameObject& other) { 
+    if (active == false || other.active == false) return;
+    if (!other.movable) {
+        //movable vs. immovable collision
+        if (x - width/2 < other.x - other.width/2 || x + width/2 > other.x + other.width/2) {
+            // collision in vertical wall
+            bounceX();  
+        } else {
+            // collision in horizontal wall
+            bounceY();  
+    }
+    } else {
+        // movable vs. movable
+        //vx = ((mass-other.mass)/sum_mass)*vx + ((other.mass*2)/sum_mass)*other.vx;
+        //other.vx = ((mass*2)/sum_mass)*vx + ((other.mass-mass)/sum_mass)*other.vx;  
+        //vy = ((mass-other.mass)/sum_mass)*vy + ((other.mass*2)/sum_mass)*other.vy;
+        //other.vy = ((mass*2)/sum_mass)*vy + ((other.mass-mass)/sum_mass)*other.vy; 
+        float tvx, tvy;
+        tvx = vx; tvy = vy;
+        vx = other.vx*bounce; vy = other.vy*bounce;
+        other.vx = tvx*bounce; other.vy = tvy*bounce;
+    }
+    // move the object out of each other to avoid more collisions
+    int i=0;
+    while (checkCollision(other) && ++i < 10) {move(); if (other.movable) other.move();}
+}
+
+void GameObject::setColor(int c) {
+    color = c;
+    orig_color = c;    
+}
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