Obtaining current ModelView matrix
22,985
Solution 1
In order to retrieve the current modelview matrix you have to call the glGetFloatv function with GL_MODELVIEW_MATRIX
parameter.
GLfloat matrix[16];
glGetFloatv (GL_MODELVIEW_MATRIX, matrix);
From the documentation:
GL_MODELVIEW_MATRIX
params returns sixteen values: the modelview matrix on the top of the modelview matrix stack. Initially this matrix is the identity matrix.
Solution 2
Use glGlet
GLfloat matrixf[16];
glGetFloatv(GL_MODELVIEW_MATRIX, matrixf);
GLdouble matrixd[16];
glGetDoublev(GL_MODELVIEW_MATRIX, matrixd);
GLint matrixi[16];
glGetIntegerv(GL_MODELVIEW_MATRIX, matrixi);
Author by
Admin
Updated on April 20, 2020Comments
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Admin about 4 years
In OpenGL, how do I read the current x/y translation in the modelview matrix? I know that you have to load the current matrix into an array and read the floats from there, but I don't know precisely how to do it.
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zhangxaochen over 7 years'glet'? or 'get'?