1 files changed, 107 insertions, 0 deletions
diff --git a/src/client/camera.cc b/src/client/camera.cc
new file mode 100644
index 0000000..ca60d18
--- /dev/null
+++ b/src/client/camera.cc
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+/* camera.cc
+   This file is part of the Osirion project and is distributed under 
+   the terms and conditions of the GNU General Public License version 2 
+*/
+
+#include "common/functions.h"
+#include "common/osirion.h"
+
+#include "game/game.h"
+#include "gl/osiriongl.h"
+
+namespace camera
+{
+enum Mode {Free, Track};
+Mode mode = Track;
+
+const float track_pitch = 15.0f; // default tracking pitch
+const float offset_inc = 5.0f; // default offset increment
+
+float yaw = 90; // current yaw, angle in XZ plane
+float yaw_offset = 0; // target offset, relative to target yaw
+
+float pitch = -90; // current pitch, angle in XY
+float pitch_offset = track_pitch; // target offset, relative to target pitch
+
+float distance = 2.0f; // distance from the eye to the target
+
+
+void draw(float elapsed) 
+{	
+	// adjust yaw target
+	float yaw_target = game::ship.yaw - yaw_offset;
+	float d = degreesf(yaw - yaw_target);
+	yaw = degreesf( yaw - d * elapsed);
+
+	// adjust pitch target
+	float pitch_target = 0.0f - pitch_offset;
+	d= degreesf(pitch - pitch_target);
+	pitch = degreesf( pitch - d *elapsed);
+	
+	/*
+	gl::translate(distance, 0.0, 0.0);
+	gl::rotate(-pitch,0, 0, 1.0 );
+	gl::rotate(-yaw, 0, 1.0f, 0);
+	*/
+	switch (mode) {
+	case Free:
+		gl::translate(1+distance * GAMESCALE, 0.0f, 0.0f);
+		gl::rotate(-pitch, 0, 0, 1.0f);
+		gl::rotate(-yaw, 0, 1.0f, 0);
+		break;
+	case Track:
+		gl::translate(1+distance* GAMESCALE, -0.5f* GAMESCALE, 0.0f);
+		gl::rotate(-pitch, 0, 0, 1.0f);
+		gl::rotate(-yaw, 0, 1.0f, 0);
+		break;
+	default:
+		break;
+	}
+}
+
+void rotate_right()
+{
+	if (mode == Free ) {
+		yaw_offset = degreesf(  yaw_offset - offset_inc);
+	}
+}
+
+void rotate_left()
+{
+	if (mode == Free ) {
+		yaw_offset = degreesf(  yaw_offset + offset_inc);
+	}
+}
+
+void rotate_up()
+{
+	if (mode == Free ) {
+		pitch_offset = degreesf( pitch_offset + offset_inc);
+	}
+}
+
+void rotate_down()
+{
+	if (mode == Free ) {
+		pitch_offset = degreesf( pitch_offset - offset_inc);
+	}
+}
+
+void nextmode() {
+	switch(mode) {
+	case Free:
+		mode = Track;
+		yaw_offset = 0;
+		yaw = game::ship.yaw;
+		pitch_offset = track_pitch;
+		break;
+	case Track:
+		mode = Free;
+		yaw_offset = 0;
+		break;
+	default:
+		break;
+	}
+}
+
+} //namespace camera