Diff: Models/Sphere.cpp

Revision:

1:4a5e329e617b

Child:

2:ef3093a7a43e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Models/Sphere.cpp	Thu Nov 10 15:38:50 2016 +0000
@@ -0,0 +1,77 @@
+//
+// Sphere.cpp - example of usage graphics commands to create 3D graphics.
+//
+// This example is based on code written by
+// Fabio de Albuquerque Dela Antonio (fabio914 at gmail.com)
+// See : https://github.com/fabio914/arduinogl/blob/master/examples
+//
+
+#include "Sphere.h"
+
+// Constructor
+Sphere::Sphere(Display * display) : Angle()
+{
+    glUseCanvas(display);
+    
+    _perspectiveAspect = display->DisplayWidth() / display->DisplayHeight();
+}
+
+
+void Sphere::Setup()
+{
+    glClear(GL_COLOR_BUFFER_BIT);
+    glPointSize(4);
+
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+
+    gluPerspective(30.0, _perspectiveAspect, 0.1f, 9999.f);
+
+    glMatrixMode(GL_MODELVIEW);
+}
+
+
+void Sphere::Render()
+{
+    float scale = 3.f;
+
+    glLoadIdentity();
+    gluLookAt(10, 8, -10, 0, 0, 0, 0, 1, 0);
+
+    glScalef(scale, scale, scale);
+    glRotatef(angle, 0.f, 1.f, 0.f);
+
+    DrawModel(1.0, 10);
+}
+
+
+void Sphere::DrawModel(float radius, float p)
+{
+
+    float theta1 = 0.f, theta2 = 0.f, theta3 = 0.f;
+    float ex, ey, ez;
+
+    for(int i = 0; i < p/2; i++) {
+
+        theta1 = i * (M_PI * 2.0)/p - M_PI_2;
+        theta2 = (i + 1) * (M_PI * 2.0)/p - M_PI_2;
+
+        glBegin(GL_TRIANGLE_STRIP);
+        for(int j = 0; j <= p; j++) {
+
+            theta3 = j * (M_PI * 2.0)/p;
+            ex = cosf(theta2) * cosf(theta3);
+            ey = sinf(theta2);
+            ez = cosf(theta2) * sinf(theta3);
+
+            glVertex3f(radius * ex, radius * ey, radius * ez);
+
+            ex = cosf(theta1) * cosf(theta3);
+            ey = sinf(theta1);
+            ez = cosf(theta1) * sinf(theta3);
+
+            glVertex3f(radius * ex, radius * ey, radius * ez);
+        }
+        glEnd();
+    }
+}
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