Adição de projecto de exemplo da biblioteca CGGL. Este exemplo mostra…

… uma bola a saltar em cima de um plano (com atenuação de altura de acordo com efeito da gravidade).
cguedes · Dec 16, 2011 · 50ae7a9 · 50ae7a9
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diff --git a/.gitignore b/.gitignore
@@ -62,4 +62,5 @@ OpenGL/Demos/_ReSharper.Demos
 
 
 OpenGL/Demos/Demos.opensdf
-OpenGL/Demos/CGGL/CGGL_Engine/Debug
+OpenGL/Demos/CGGL/CGGL_Engine/Debug
+OpenGL/Demos/CGGL/BouncingBall/Debug
diff --git a/OpenGL/Demos/CGGL/BouncingBall/Ball.cpp b/OpenGL/Demos/CGGL/BouncingBall/Ball.cpp
@@ -0,0 +1,60 @@
+#include "ball.h" 
+
+using namespace cggl;
+
+Ball::Ball(Vector3 pos, float rad): position(pos), radius(rad){
+
+  velocity = Vector3(0,20,0);
+}
+
+//void Ball::Update(int deltaTimeMilis){
+//  Object::Update(deltaTimeMilis);
+//  double t = deltaTimeMilis/(float)1000;
+//
+//}
+
+void Ball::Draw(){
+  Object::Draw();
+    glEnable(GL_LIGHTING);
+	glEnable(GL_LIGHT0);
+    glPushMatrix();
+    float diffuseColor[3] = { 0.8, 0, 0 };
+    glColor3f(diffuseColor[0], diffuseColor[1], diffuseColor[2]);
+    glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, diffuseColor);
+
+    glTranslated(position.x, position.y, position.z);
+    glutSolidSphere(radius, 30, 30);
+    glPopMatrix();
+    glDisable(GL_LIGHTING);
+}
+
+
+void Ball::Update(int deltaTimeMilis){
+  Object::Update(deltaTimeMilis);
+
+  double t = deltaTimeMilis/(float)1000;
+
+  double mass = 0.5;
+  // a = F / m
+  double fg = mass * -9.8;    // fg = m*g 
+  double fdy = -6*3.14*radius*0.00001827*velocity.y;
+  double fdx = -6*3.14*radius*0.00001827*velocity.x;
+
+  double ax = (fdx) / mass;
+  double ay = (fg + fdy) / mass;
+
+  // v = v0 + a*t 
+  velocity.y += ay * t;
+  velocity.x += ax * t; // air resistance
+
+  // x = x0+ vo*t + 0.5*a*t*t  
+  position.y = position.y + velocity.y*t + 0.5 * ay * t * t;
+  position.x = position.x + velocity.x*t;
+
+  if(position.y <= radius){
+    position.y = radius;
+    velocity.y = -velocity.y * .8;  // COR - coeficiente de restituicao (simulacao)
+    velocity.x = velocity.x  * .8;  // atrito (simulacao)
+  }
+
+}
diff --git a/OpenGL/Demos/CGGL/BouncingBall/Ball.h b/OpenGL/Demos/CGGL/BouncingBall/Ball.h
@@ -0,0 +1,33 @@
+/**********************************************************************************
+ * Definição do objecto Ball.
+ *
+ *
+ * --------------------------------------------------------------------------------
+ * Instituto Superior de Engenharia de Lisboa
+ * Departamento de Engenharia de Electrónica e Telecomunicações e de Computadores
+ * Licenciatura em Engenharia Informática e de Computadores
+ * Computação Gráfica
+ *
+ * (c) Carlos Guedes e José Branco - Novembro de 2007
+ **********************************************************************************/
+#ifndef _BALL_H_
+#define _BALL_H_
+
+#include <GL/glut.h>
+#include <cggl/App.h>
+
+
+class Ball : public cggl::Object {
+
+  cggl::Vector3 position;  // posição inicial
+  float radius;
+  cggl::Vector3 velocity;
+
+public: 
+  Ball(cggl::Vector3 pos, float rad);
+
+  void Update(int deltaTimeMilis);
+  void Draw();
+};
+
+#endif //_BALL_H_
diff --git a/OpenGL/Demos/CGGL/BouncingBall/BouncingBall.vcxproj b/OpenGL/Demos/CGGL/BouncingBall/BouncingBall.vcxproj
@@ -0,0 +1,104 @@
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diff --git a/OpenGL/Demos/CGGL/BouncingBall/BouncingBall.vcxproj.filters b/OpenGL/Demos/CGGL/BouncingBall/BouncingBall.vcxproj.filters
@@ -0,0 +1,78 @@
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diff --git a/OpenGL/Demos/CGGL/BouncingBall/BouncingBallApp.cpp b/OpenGL/Demos/CGGL/BouncingBall/BouncingBallApp.cpp
@@ -0,0 +1,36 @@
+#include <GL/glut.h>
+#include <cggl/App.h>
+#include <cggl/FPSCounter.h>
+
+#include "BouncingBallApp.h"
+#include "Ball.h"
+#include "SimplePlane.h"
+
+using namespace cggl;
+
+void BouncingBallApp::CreateScene() {
+  App::Camera->LookAt(Vector3(0, 20, 50), Vector3(0,20,0), Vector3(0,1,0));
+
+  RegisterObject( new Ball(Vector3(-10, 2, 0), 2) );
+
+  RegisterObject( new SimplePlane(0, 100) );
+  RegisterObject( new FPSCounter() );
+}
+
+void BouncingBallApp::Draw(){
+  App::Draw();
+}
+
+void BouncingBallApp::Update(int deltaTimeMilis) {
+  App::Update(deltaTimeMilis);
+}
+
+
+
+
+// ------------------------------------------------------------------------------------
+void main(int argc, char **argv) {
+  BouncingBallApp app;
+  app.Run(argc, argv);
+}
+// ------------------------------------------------------------------------------------
diff --git a/OpenGL/Demos/CGGL/BouncingBall/BouncingBallApp.h b/OpenGL/Demos/CGGL/BouncingBall/BouncingBallApp.h
@@ -0,0 +1,27 @@
+/**********************************************************************************
+ * Aplicação específica a implementar: AP3.
+ * Serve como exemplo de utilização de fisica em objectos.
+ * 
+ * A aplicação representa uma cena que contém uma bola 
+ *  a saltar na vertical, em cima de um plano segundo as leis da fisica.
+ *
+ *
+ * --------------------------------------------------------------------------------
+ * Instituto Superior de Engenharia de Lisboa
+ * Departamento de Engenharia de Electrónica e Telecomunicações e de Computadores
+ * Licenciatura em Engenharia Informática e de Computadores
+ * Computação Gráfica
+ *
+ * (c) Carlos Guedes e José Branco - Novembro de 2007
+ **********************************************************************************/
+
+#include <GL/glut.h>
+#include <cggl/App.h>
+
+class BouncingBallApp : public cggl::App {
+
+public: 
+  void CreateScene();
+  void Draw();
+  void Update(int deltaTimeMilis);
+};