130 lines
3.4 KiB
C++
130 lines
3.4 KiB
C++
/* SPDX-FileCopyrightText: 2008-2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup freestyle
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* \brief Class to represent a light node
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*/
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#include <cmath>
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#include <cstring> // for memcpy
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#include "NodeCamera.h"
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namespace Freestyle {
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static void loadIdentity(double *matrix)
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{
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int i;
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// Build Identity matrix
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for (i = 0; i < 16; ++i) {
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double value;
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if ((i % 5) == 0) {
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value = 1.0;
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}
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else {
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value = 0;
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}
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matrix[i] = value;
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}
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}
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NodeCamera::NodeCamera(CameraType camera_type) : camera_type_(camera_type)
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{
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loadIdentity(modelview_matrix_);
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loadIdentity(projection_matrix_);
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}
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#if 0 /* UNUSED, gives warning in gcc */
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NodeCamera::NodeCamera(const NodeCamera &iBrother) : camera_type_(iBrother.camera_type_)
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{
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memcpy(modelview_matrix_, iBrother.modelview_matrix_, sizeof(double[16]));
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memcpy(projection_matrix_, iBrother.projection_matrix_, sizeof(double[16]));
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}
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#endif
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void NodeCamera::accept(SceneVisitor &v)
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{
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v.visitNodeCamera(*this);
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}
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void NodeCamera::setModelViewMatrix(const double modelview_matrix[16])
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{
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memcpy(modelview_matrix_, modelview_matrix, sizeof(double[16]));
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}
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void NodeCamera::setProjectionMatrix(const double projection_matrix[16])
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{
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memcpy(projection_matrix_, projection_matrix, sizeof(double[16]));
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}
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NodeOrthographicCamera::NodeOrthographicCamera()
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: NodeCamera(NodeCamera::ORTHOGRAPHIC),
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left_(0),
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right_(0),
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bottom_(0),
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top_(0),
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zNear_(0),
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zFar_(0)
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{
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loadIdentity(projection_matrix_);
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loadIdentity(modelview_matrix_);
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}
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NodeOrthographicCamera::NodeOrthographicCamera(
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double left, double right, double bottom, double top, double zNear, double zFar)
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: NodeCamera(NodeCamera::ORTHOGRAPHIC),
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left_(left),
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right_(right),
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bottom_(bottom),
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top_(top),
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zNear_(zNear),
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zFar_(zFar)
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{
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loadIdentity(projection_matrix_);
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projection_matrix_[0] = 2.0 / (right - left);
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projection_matrix_[3] = -(right + left) / (right - left);
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projection_matrix_[5] = 2.0 / (top - bottom);
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projection_matrix_[7] = -(top + bottom) / (top - bottom);
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projection_matrix_[10] = -2.0 / (zFar - zNear);
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projection_matrix_[11] = -(zFar + zNear) / (zFar - zNear);
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}
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NodePerspectiveCamera::NodePerspectiveCamera() : NodeCamera(NodeCamera::PERSPECTIVE) {}
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NodePerspectiveCamera::NodePerspectiveCamera(double fovy, double aspect, double zNear, double zFar)
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: NodeCamera(NodeCamera::PERSPECTIVE)
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{
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loadIdentity(projection_matrix_);
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double f = cos(fovy / 2.0) / sin(fovy / 2.0); // cotangent
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projection_matrix_[0] = f / aspect;
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projection_matrix_[5] = f;
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projection_matrix_[10] = (zNear + zFar) / (zNear - zFar);
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projection_matrix_[11] = (2.0 * zNear * zFar) / (zNear - zFar);
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projection_matrix_[14] = -1.0;
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projection_matrix_[15] = 0;
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}
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NodePerspectiveCamera::NodePerspectiveCamera(
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double left, double right, double bottom, double top, double zNear, double zFar)
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: NodeCamera(NodeCamera::PERSPECTIVE)
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{
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loadIdentity(projection_matrix_);
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projection_matrix_[0] = (2.0 * zNear) / (right - left);
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projection_matrix_[2] = (right + left) / (right - left);
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projection_matrix_[5] = (2.0 * zNear) / (top - bottom);
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projection_matrix_[6] = (top + bottom) / (top - bottom);
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projection_matrix_[10] = -(zFar + zNear) / (zFar - zNear);
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projection_matrix_[11] = -(2.0 * zFar * zNear) / (zFar - zNear);
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projection_matrix_[14] = -1.0;
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projection_matrix_[15] = 0;
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}
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} /* namespace Freestyle */
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