1 files changed, 120 insertions, 0 deletions
diff --git a/source/blender/freestyle/intern/scene_graph/NodeCamera.cpp b/source/blender/freestyle/intern/scene_graph/NodeCamera.cpp
new file mode 100644
index 00000000000..1d095b35a0d
--- /dev/null
+++ b/source/blender/freestyle/intern/scene_graph/NodeCamera.cpp
@@ -0,0 +1,120 @@
+#include <string.h> // for memcpy
+#include "NodeCamera.h"
+#include <math.h>
+
+void loadIdentity(double * matrix){
+    int i;
+
+    // Build Identity matrix
+    for(i=0;i<16;++i){
+        double value ;
+        if((i % 5) == 0)
+            value = 1.0;
+        else
+            value = 0;
+        matrix[i] = value;
+    }
+}
+
+NodeCamera::NodeCamera(CameraType camera_type)
+:camera_type_(camera_type){
+    loadIdentity(modelview_matrix_);
+    loadIdentity(projection_matrix_);
+}
+
+NodeCamera::NodeCamera(const NodeCamera& iBrother)
+:camera_type_(iBrother.camera_type_){
+    memcpy(modelview_matrix_, iBrother.modelview_matrix_, 16*sizeof(double));
+    memcpy(projection_matrix_, iBrother.projection_matrix_, 16*sizeof(double));
+}
+
+void NodeCamera::accept(SceneVisitor& v){
+    v.visitNodeCamera(*this)   ;
+}
+
+void NodeCamera::setModelViewMatrix(double modelview_matrix[16]){
+    memcpy(modelview_matrix_, modelview_matrix,16*sizeof(double));
+}
+
+void NodeCamera::setProjectionMatrix(double projection_matrix[16]){
+    memcpy(projection_matrix_, projection_matrix,16*sizeof(double));
+}
+
+NodeOrthographicCamera::NodeOrthographicCamera()
+:NodeCamera(NodeCamera::ORTHOGRAPHIC),
+left_(0),right_(0),bottom_(0),top_(0),zNear_(0),zFar_(0){
+    loadIdentity(projection_matrix_);
+    loadIdentity(modelview_matrix_);
+}
+
+NodeOrthographicCamera::NodeOrthographicCamera(double left
+                                                , double right
+                                                , double bottom
+                                                , double top
+                                                , double zNear
+                                                , double zFar
+                                                )
+:NodeCamera(NodeCamera::ORTHOGRAPHIC),
+left_(left),
+right_(right),
+bottom_(bottom),
+top_(top),
+zNear_(zNear),
+zFar_(zFar){
+
+    loadIdentity(projection_matrix_);
+
+    projection_matrix_[0] = 2.0/(right-left);
+    projection_matrix_[3] = -(right + left) / (right - left) ;
+    projection_matrix_[5] = 2.0/(top-bottom);
+    projection_matrix_[7] = -(top + bottom) / (top - bottom) ;
+    projection_matrix_[10] = -2.0/(zFar-zNear);
+    projection_matrix_[11] = -(zFar + zNear) / (zFar - zNear);
+
+}
+
+NodeOrthographicCamera::NodeOrthographicCamera(const NodeOrthographicCamera& iBrother)
+:NodeCamera(iBrother),left_(iBrother.left_),right_(iBrother.right_),bottom_(iBrother.bottom_),top_(iBrother.top_),zNear_(iBrother.zNear_),zFar_(iBrother.zFar_){
+}
+
+NodePerspectiveCamera::NodePerspectiveCamera()
+:NodeCamera(NodeCamera::PERSPECTIVE){
+}
+
+NodePerspectiveCamera::NodePerspectiveCamera(double fovy
+                                        , double aspect
+                                        , double zNear
+                                        , double zFar)
+:NodeCamera(NodeCamera::PERSPECTIVE){
+    loadIdentity(projection_matrix_);
+
+    double f = cos(fovy/2.0)/sin(fovy/2.0); // cotangent
+
+    projection_matrix_[0] = f/aspect;
+    projection_matrix_[5] = f;
+    projection_matrix_[10] = (zNear+zFar)/(zNear-zFar);
+    projection_matrix_[11] = (2.0*zNear*zFar)/(zNear-zFar);
+    projection_matrix_[14] = -1.0;
+    projection_matrix_[15] = 0;
+
+}
+
+NodePerspectiveCamera::NodePerspectiveCamera(double left,
+                                        double right,
+                                        double bottom,
+                                        double top,
+                                        double zNear,
+                                        double zFar)
+:NodeCamera(NodeCamera::PERSPECTIVE){
+    loadIdentity(projection_matrix_);
+
+    projection_matrix_[0] = (2.0*zNear)/(right-left);
+    projection_matrix_[2] = (right+left)/(right-left);
+    projection_matrix_[5] = (2.0*zNear)/(top-bottom);
+    projection_matrix_[6] = (top+bottom)/(top-bottom);
+    projection_matrix_[10] = - (zFar+zNear)/(zFar-zNear);
+    projection_matrix_[11] = - (2.0*zFar*zNear)/(zFar-zNear);
+    projection_matrix_[14] = -1.0;
+    projection_matrix_[15] = 0;
+}
+