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{{Code|Section of opengl_renderer::setup_opengl_transformation ()"|<syntaxhighlight lang="C" style="font-size:13px"> | {{Code|Section of opengl_renderer::setup_opengl_transformation ()"|<syntaxhighlight lang="C" style="font-size:13px"> | ||
Matrix x_zlim = props.get_transform_zlim (); | |||
xZ1 = x_zlim(0)-(x_zlim(1)-x_zlim(0))/2; | |||
xZ2 = x_zlim(1)+(x_zlim(1)-x_zlim(0))/2; | |||
// Load x_gl_mat1 and x_gl_mat2 | |||
Matrix x_mat1 = props.get_opengl_matrix_1 (); | |||
Matrix x_mat2 = props.get_opengl_matrix_2 (); | |||
m_glfcns.glMatrixMode (GL_MODELVIEW); | |||
m_glfcns.glLoadIdentity (); | |||
m_glfcns.glScaled (1, 1, -1); | |||
// Matrix x_gl_mat2 | |||
m_glfcns.glMultMatrixd (x_mat1.data ()); | |||
m_glfcns.glMatrixMode (GL_PROJECTION); | |||
m_glfcns.glLoadIdentity (); | |||
Matrix vp = get_viewport_scaled (); | |||
// Install Orthographic Projection Matrix with viewport | |||
// setting 0, vp(2), vp(3), 0 and near / far values xZ1, xZ2 | |||
m_glfcns.glOrtho (0, vp(2), vp(3), 0, xZ1, xZ2); | |||
// Matrix x_gl_mat2 | |||
m_glfcns.glMultMatrixd (x_mat2.data ()); | |||
m_glfcns.glMatrixMode (GL_MODELVIEW); | |||
m_glfcns.glClear (GL_DEPTH_BUFFER_BIT); | |||
</syntaxhighlight>}} | </syntaxhighlight>}} | ||