Improved OpenGL and X11 rotating cube examples.
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@ -36,6 +36,10 @@ void initialize(sf::Window& window)
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static const double pi = 3.141592654;
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GLdouble extent = std::tan(90.0 * pi / 360.0);
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glFrustum(-extent, extent, -extent, extent, 1.0, 500.0);
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// Enable position and texture coordinates vertex components
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glEnableClientState(GL_VERTEX_ARRAY);
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glEnableClientState(GL_COLOR_ARRAY);
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}
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////////////////////////////////////////////////////////////
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@ -62,46 +66,57 @@ void draw(sf::Window& window, float elapsedTime)
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glRotatef(elapsedTime * 6.f, 0.f, 1.f, 0.f);
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glRotatef(elapsedTime * 18.f, 0.f, 0.f, 1.f);
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// Draw a cube
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glBegin(GL_QUADS);
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// Define a 3D cube (6 faces made of 2 triangles composed by 3 vertices)
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static const GLfloat cube[] =
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{
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// positions // colors
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-50, -50, -50, 1, 1, 0,
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-50, 50, -50, 1, 1, 0,
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-50, -50, 50, 1, 1, 0,
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-50, -50, 50, 1, 1, 0,
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-50, 50, -50, 1, 1, 0,
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-50, 50, 50, 1, 1, 0,
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glColor3f(1.f, 1.f, 0.f);
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glVertex3f(-50.f, -50.f, -50.f);
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glVertex3f(-50.f, 50.f, -50.f);
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glVertex3f( 50.f, 50.f, -50.f);
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glVertex3f( 50.f, -50.f, -50.f);
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50, -50, -50, 1, 1, 0,
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50, 50, -50, 1, 1, 0,
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50, -50, 50, 1, 1, 0,
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50, -50, 50, 1, 1, 0,
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50, 50, -50, 1, 1, 0,
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50, 50, 50, 1, 1, 0,
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glColor3f(1.f, 1.f, 0.f);
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glVertex3f(-50.f, -50.f, 50.f);
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glVertex3f(-50.f, 50.f, 50.f);
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glVertex3f( 50.f, 50.f, 50.f);
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glVertex3f( 50.f, -50.f, 50.f);
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-50, -50, -50, 1, 0, 1,
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50, -50, -50, 1, 0, 1,
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-50, -50, 50, 1, 0, 1,
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-50, -50, 50, 1, 0, 1,
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50, -50, -50, 1, 0, 1,
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50, -50, 50, 1, 0, 1,
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glColor3f(0.f, 1.f, 1.f);
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glVertex3f(-50.f, -50.f, -50.f);
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glVertex3f(-50.f, 50.f, -50.f);
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glVertex3f(-50.f, 50.f, 50.f);
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glVertex3f(-50.f, -50.f, 50.f);
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-50, 50, -50, 1, 0, 1,
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50, 50, -50, 1, 0, 1,
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-50, 50, 50, 1, 0, 1,
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-50, 50, 50, 1, 0, 1,
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50, 50, -50, 1, 0, 1,
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50, 50, 50, 1, 0, 1,
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glColor3f(0.f, 1.f, 1.f);
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glVertex3f(50.f, -50.f, -50.f);
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glVertex3f(50.f, 50.f, -50.f);
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glVertex3f(50.f, 50.f, 50.f);
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glVertex3f(50.f, -50.f, 50.f);
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-50, -50, -50, 0, 1, 1,
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50, -50, -50, 0, 1, 1,
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-50, 50, -50, 0, 1, 1,
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-50, 50, -50, 0, 1, 1,
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50, -50, -50, 0, 1, 1,
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50, 50, -50, 0, 1, 1,
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glColor3f(1.f, 0.f, 1.f);
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glVertex3f(-50.f, -50.f, 50.f);
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glVertex3f(-50.f, -50.f, -50.f);
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glVertex3f( 50.f, -50.f, -50.f);
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glVertex3f( 50.f, -50.f, 50.f);
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-50, -50, 50, 0, 1, 1,
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50, -50, 50, 0, 1, 1,
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-50, 50, 50, 0, 1, 1,
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-50, 50, 50, 0, 1, 1,
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50, -50, 50, 0, 1, 1,
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50, 50, 50, 0, 1, 1
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};
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glColor3f(1.f, 0.f, 1.f);
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glVertex3f(-50.f, 50.f, 50.f);
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glVertex3f(-50.f, 50.f, -50.f);
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glVertex3f( 50.f, 50.f, -50.f);
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glVertex3f( 50.f, 50.f, 50.f);
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glEnd();
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// Draw the cube
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glVertexPointer(3, GL_FLOAT, 6 * sizeof(GLfloat), cube);
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glColorPointer(3, GL_FLOAT, 6 * sizeof(GLfloat), cube + 3);
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glDrawArrays(GL_TRIANGLES, 0, 36);
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}
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@ -80,7 +80,7 @@ int main()
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glBindTexture(GL_TEXTURE_2D, texture);
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// Define a 3D cube (6 faces made of 2 triangles composed by 3 vertices)
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GLfloat cube[] =
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static const GLfloat cube[] =
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{
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// positions // texture coordinates
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-20, -20, -20, 0, 0,
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