begin to implement --viewport option, by adding Camera class + children

1 files changed, 53 insertions, 0 deletions

diff --git a/src/linalg.h b/src/linalg.h
index 1f9ed30..31cd922 100644
--- a/src/linalg.h
+++ b/src/linalg.h
@@ -40,4 +40,57 @@ public:
 	bool isValid() const { return this->minCoeff() >= 0.0f; }
 };
 
+
+
+// FIXME - for camera, use boost::variant like in value.cc
+
+#include <vector>
+
+
+class Camera
+{
+public:
+	enum camera_type_e { GIMBAL_CAMERA, VECTOR_CAMERA, NULL_CAMERA } camtype;
+	Camera() { camtype = NULL_CAMERA; }
+	virtual ~Camera() {} // only prevent 'not polymorphic' compile error
+};
+
+class GimbalCamera : public Camera
+{
+public:
+	GimbalCamera()
+	{
+		camtype = GIMBAL_CAMERA;
+		object_trans << 0,0,0;
+		object_rot << 35,0,25;
+		viewer_distance = 500;
+	}
+	void setup( std::vector<double> d )
+	{
+		assert( d.size() == 7 );
+		object_trans << d[0], d[1], d[2];
+		object_rot << d[3], d[4], d[5];
+		viewer_distance = d[6];
+	}
+	Eigen::Vector3d object_trans;
+	Eigen::Vector3d object_rot;
+	double viewer_distance;
+};
+
+class VectorCamera : public Camera
+{
+public:
+	VectorCamera()
+	{
+		camtype = VECTOR_CAMERA;
+		center << 0,0,0;
+		Eigen::Vector3d cameradir(1, 1, -0.5);
+		eye = center - 500 * cameradir;
+		// "up" not currently used
+	}
+	Eigen::Vector3d eye;
+	Eigen::Vector3d center; // (aka 'target')
+	Eigen::Vector3d up;
+};
+
 #endif