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Matrix elements were interpreted in different ways. This makes it definitely row-major, allowing initialization via initializer list in a standard scientific order. Also matrix multiplication now happens in the correct order and accessing elements happens as m_elements[row][column].
75 lines
2 KiB
C++
75 lines
2 KiB
C++
/*
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* Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
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* Copyright (c) 2021, Stephan Unverwerth <s.unverwerth@gmx.de>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "GL/gl.h"
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#include "GLContext.h"
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extern GL::GLContext* g_gl_context;
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void glMatrixMode(GLenum mode)
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{
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g_gl_context->gl_matrix_mode(mode);
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}
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/*
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* Push the current matrix (based on the current matrix mode)
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* to its' corresponding matrix stack in the current OpenGL
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* state context
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*/
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void glPushMatrix()
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{
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g_gl_context->gl_push_matrix();
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}
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/*
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* Pop a matrix from the corresponding matrix stack into the
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* corresponding matrix in the state based on the current
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* matrix mode
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*/
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void glPopMatrix()
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{
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g_gl_context->gl_pop_matrix();
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}
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void glLoadMatrixf(const GLfloat* matrix)
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{
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// Transpose the matrix here because glLoadMatrix expects elements
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// in column major order but out Matrix class stores elements in
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// row major order.
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FloatMatrix4x4 mat(
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matrix[0], matrix[4], matrix[8], matrix[12],
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matrix[1], matrix[5], matrix[9], matrix[13],
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matrix[2], matrix[6], matrix[10], matrix[14],
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matrix[3], matrix[7], matrix[11], matrix[15]);
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g_gl_context->gl_load_matrix(mat);
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}
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void glLoadIdentity()
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{
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g_gl_context->gl_load_identity();
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}
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/**
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* Create a viewing frustum (a.k.a a "Perspective Matrix") in the current matrix. This
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* is usually done to the projection matrix. The current matrix is then multiplied
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* by this viewing frustum matrix.
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*
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* https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glFrustum.xml
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*
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*
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* FIXME: We need to check for some values that could result in a division by zero
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*/
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void glFrustum(GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble nearVal, GLdouble farVal)
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{
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g_gl_context->gl_frustum(left, right, bottom, top, nearVal, farVal);
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}
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void glOrtho(GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble nearVal, GLdouble farVal)
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{
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g_gl_context->gl_ortho(left, right, bottom, top, nearVal, farVal);
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}
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