From 7a75ef50dcf1955739969b47ff88c6fce9c3843a Mon Sep 17 00:00:00 2001
From: Stijn Buys <ingar@osirion.org>
Date: Mon, 4 Oct 2010 13:44:57 +0000
Subject: modelview widget rotation manipulation

---
 src/ui/modelview.cc | 115 ++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 111 insertions(+), 4 deletions(-)

(limited to 'src/ui/modelview.cc')

diff --git a/src/ui/modelview.cc b/src/ui/modelview.cc
index c00cb07..a6a69ed 100755
--- a/src/ui/modelview.cc
+++ b/src/ui/modelview.cc
@@ -5,6 +5,7 @@
 */
 
 #include "auxiliary/functions.h"
+#include "core/application.h"
 #include "ui/modelview.h"
 #include "ui/paint.h"
 #include "sys/sys.h"
@@ -24,6 +25,11 @@ ModelView::ModelView(Widget *parent, const char *modelname) : Widget(parent)
 	set_modelname(modelname);
 
 	modelview_zoom = 1.0f;
+	modelview_manip = false;
+	
+	modelview_axis.clear();
+	modelview_axis.change_direction(180);
+	modelview_axis.change_pitch(-15);
 }
 
 ModelView::~ModelView()
@@ -68,11 +74,57 @@ bool ModelView::on_keypress(const int key, const unsigned int modifier)
 		if (modelview_zoom > 10.0f)
 			modelview_zoom = 10.0f;
 		return true;
+	} else if (key == 512 + SDL_BUTTON_LEFT) {
+		//modelview_manipaxis.clear();
+		modelview_manip = true;
+		return true;
 	}
 
 	return false;
 }
 
+bool ModelView::on_keyrelease(const int key, const unsigned int modifier)
+{
+	if (key == 512 + SDL_BUTTON_LEFT) {
+		//modelview_manipaxis.clear();
+		modelview_manip = false;
+		return true;
+	}
+
+	return false;
+}
+
+void ModelView::on_mousemove(const math::Vector2f &cursor) 
+{
+	if ((width() <= 0) || (height() <= 0)) {
+		return;
+	}
+	
+	if (modelview_manip) {	
+		const math::Vector2f pos(cursor - modelview_cursor);
+		
+		const math::Vector3f up(0.0f, 0.0f, 1.0f);
+		const float zrot = 45.0f * pos.x() / width();
+		modelview_axis.rotate(up, -zrot);
+		//modelview_manipaxis.rotate(up, -zrot);
+		
+		const math::Vector3f left(0.0f, 1.0f, 0.0f);
+		const float yrot = 45.0f * pos.y() / height();
+		modelview_axis.rotate(left, yrot);
+		//modelview_manipaxis.rotate(left, yrot);
+	
+		modelview_cursor.assign(cursor);
+	}
+	modelview_cursor.assign(cursor);
+}
+
+void ModelView::on_mouseover(const math::Vector2f &cursor)
+{
+	modelview_cursor.assign(cursor);
+	//modelview_manipaxis.clear();
+	modelview_manip = false;
+}
+
 void ModelView::draw_background()
 {
 	Paint::set_color(1.0f, 1.0f, 1.0f);
@@ -98,8 +150,12 @@ void ModelView::draw()
 	gl::clear(GL_DEPTH_BUFFER_BIT);
 
 	// gl 3d mode
-	render::Camera::frustum_default(model->radius() * modelview_zoom, center.x(), center.y());
+	render::Camera::frustum_default(modelview_zoom * model->radius(), center.x(), center.y());
 
+	// apply manipulation
+	gl::push();
+	gl::multmatrix(modelview_axis);
+	
 	gl::disable(GL_BLEND);
 	gl::depthmask(GL_TRUE);		// enable writing to the depth buffer
 	gl::enable(GL_DEPTH_TEST);
@@ -124,12 +180,63 @@ void ModelView::draw()
 	gl::disable(GL_LIGHTING);
 	gl::disable(GL_COLOR_MATERIAL);	// disable color tracking
 	gl::disable(GL_CULL_FACE);	// disable culling
-
+	
+	gl::enable(GL_BLEND);		// enable alpha blending
+	gl::pop();
+	
+	/*
+	// draw manipulation marker
+	if (has_mouse_focus() && modelview_manip) {
+		
+		gl::push();
+		gl::multmatrix(modelview_manipaxis);
+		
+		const float r = model->radius();
+		glAlphaFunc(GL_GREATER, 0.5f);
+		gl::enable(GL_ALPHA_TEST);
+		
+		gl::color(1.0f, 1.0f, 1.0f, 1.0f);
+		render::Textures::bind("bitmaps/ui/rotate");
+		gl::enable(GL_TEXTURE_2D);
+		
+		gl::begin(gl::Quads);
+		
+		gl::texcoord(0.0f, 0.0f);
+		gl::vertex(r, 0.0f, r);
+		
+		gl::texcoord(1.0f, 0.0f);
+		gl::vertex(r, 0.0f, -r);
+		
+		gl::texcoord(1.0f, 1.0f);
+		gl::vertex(-r, 0.0f, -r);
+		
+		gl::texcoord(0.0f, 1.0f);
+		gl::vertex(-r, 0.0f, r);
+		
+		
+		gl::texcoord(1.0f, 1.0f);
+		gl::vertex(r, r, 0.0f);
+		
+		gl::texcoord(0.0f, 1.0f);
+		gl::vertex(r, -r, 0.0f);
+		
+		gl::texcoord(0.0f, 0.0f);
+		gl::vertex(-r, -r, 0.0f);
+		
+		gl::texcoord(1.0f, 0.0f);
+		gl::vertex(-r, r, 0.0f);
+		
+		gl::end();
+		
+		gl::disable(GL_TEXTURE_2D);
+		gl::disable(GL_ALPHA_TEST);
+		
+		gl::pop();
+	}
+	*/
 	gl::depthmask(GL_TRUE);		// enable depth buffer writing
 	gl::disable(GL_DEPTH_TEST);	// disable depth buffer testing
 
-	gl::enable(GL_BLEND);
-
 	// gl 2d mode
 	render::Camera::ortho();
 }
-- 
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