X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=src%2F3dengfx%2Fsrc%2F3dengfx%2Fcamera.cpp;fp=src%2F3dengfx%2Fsrc%2F3dengfx%2Fcamera.cpp;h=c35055a48ed3b5bce86803e90ae28906a9f424a0;hb=6e23259dbabaeb1711a2a5ca25b9cb421f693759;hp=0000000000000000000000000000000000000000;hpb=fe068fa879814784c45e0cb2e65dac489e8f5594;p=summerhack

diff --git a/src/3dengfx/src/3dengfx/camera.cpp b/src/3dengfx/src/3dengfx/camera.cpp
new file mode 100644
index 0000000..c35055a
--- /dev/null
+++ b/src/3dengfx/src/3dengfx/camera.cpp
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+/*
+This file is part of the 3dengfx, realtime visualization system.
+
+Copyright (c) 2004, 2005 John Tsiombikas <nuclear@siggraph.org>
+
+3dengfx is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+3dengfx is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with 3dengfx; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+#include "3dengfx_config.h"
+
+#include "camera.hpp"
+#include "3denginefx.hpp"
+
+Camera::Camera(const Vector3 &translation, const Quaternion &rot) 
+	: BaseCamera(translation, rot) {}
+
+Matrix4x4 Camera::get_camera_matrix(unsigned long msec) const {
+	PRS prs = get_prs(msec);
+
+	Matrix4x4 vmat = prs.rotation.inverse().get_rotation_matrix();
+	vmat.translate(-prs.position);
+
+	// TODO: this does not work...
+	Matrix4x4 flip_matrix;
+	if(flip_view.x) flip_matrix[0][0] = -1;
+	if(flip_view.y) flip_matrix[1][1] = -1;
+	if(flip_view.z) flip_matrix[2][2] = -1;
+
+	return flip_matrix * vmat;
+}
+/*
+void Camera::activate(unsigned long msec) const {
+	set_matrix(XFORM_VIEW, get_camera_matrix(msec));
+
+	Matrix4x4 proj = get_projection_matrix();
+	set_matrix(XFORM_PROJECTION, proj);
+
+	engfx_state::view_mat_camera = this;
+	const_cast<Camera*>(this)->setup_frustum(proj * engfx_state::view_matrix);
+}
+*/
+
+TargetCamera::TargetCamera(const Vector3 &trans, const Vector3 &target) : Camera(trans) {
+	set_target(target);
+}
+
+TargetCamera::~TargetCamera() {}
+
+void TargetCamera::set_target(const Vector3 &target) {
+	this->target.set_position(target);
+}
+
+Vector3 TargetCamera::get_target(unsigned long msec) const {
+	return target.get_prs(msec).position;
+}
+
+Matrix4x4 TargetCamera::get_camera_matrix(unsigned long msec) const {
+	PRS prs = get_prs(msec);
+	Vector3 targ = target.get_prs(msec).position;
+
+	Vector3 pvec = prs.position - targ;
+	pvec.transform(prs.rotation.get_rotation_matrix());
+	Vector3 pos = targ + pvec;
+
+#ifdef COORD_LHS
+	Vector3 n = (targ - pos).normalized();
+#else
+	Vector3 n = -(targ - pos).normalized();
+#endif
+	Vector3 u = cross_product(up, n).normalized();
+	Vector3 v;
+	
+	if(flip_view.y) {
+		v = cross_product(u, n);
+		set_front_face(ORDER_CCW);
+	} else {
+		v = cross_product(n, u);
+		set_front_face(ORDER_CW);
+	}
+
+	scalar_t tx = -dot_product(u, pos);
+	scalar_t ty = -dot_product(v, pos);
+	scalar_t tz = -dot_product(n, pos);
+	
+	return Matrix4x4(u.x, u.y, u.z, tx,
+					v.x, v.y, v.z, ty,
+					n.x, n.y, n.z, tz,
+					0.0, 0.0, 0.0, 1.0);
+}
+
+/*
+void TargetCamera::activate(unsigned long msec) const {
+	set_matrix(XFORM_VIEW, get_camera_matrix(msec));
+
+	Matrix4x4 proj = get_projection_matrix();
+	set_matrix(XFORM_PROJECTION, proj);
+
+	engfx_state::view_mat_camera = this;
+	const_cast<TargetCamera*>(this)->setup_frustum(proj * engfx_state::view_matrix);
+}
+*/
+
+void TargetCamera::zoom(scalar_t factor, unsigned long msec) {
+	Vector3 pos = get_prs(msec).position;
+	Vector3 targ = get_target(msec);
+
+	Vector3 dist_vec = (pos - targ) * factor;
+
+	set_position(targ + dist_vec, msec);
+}
+
+void TargetCamera::roll(scalar_t angle, unsigned long msec) {
+	Vector3 axis = target.get_prs(msec).position - get_prs(msec).position;
+	Quaternion q(axis.normalized(), fmod(angle, two_pi));
+	up = Vector3(0, 1, 0);
+	up.transform(q);
+}