From 611f07a2e6dbfa64c5467022949c7ce938fc09f4 Mon Sep 17 00:00:00 2001
From: Jon Bergli Heier <snakebite@jvnv.net>
Date: Sat, 16 Apr 2011 17:04:18 +0200
Subject: wip

---
 scene.cpp | 83 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 82 insertions(+), 1 deletion(-)

(limited to 'scene.cpp')

diff --git a/scene.cpp b/scene.cpp
index f994627..0c31bc8 100644
--- a/scene.cpp
+++ b/scene.cpp
@@ -39,11 +39,20 @@ Scene::Scene() {
 	glUniform1i(markloc, 3);
 	glUseProgram(0);
 
+	GLFragmentShader selection_fragment("shaders/selection_fragment.glsl");
+	GLVertexShader selection_vertex("shaders/selection_vertex.glsl");
+	selection_program.attach(selection_fragment);
+	selection_program.attach(selection_vertex);
+	selection_program.link();
+
+	selection_particles = NULL;
+
 	/* load textures */
 	grass_texture = load_texture("textures/zooboing-366-grass.jpg");
 	rock_texture = load_texture("textures/zooboing-825-stone-modified.jpg");
 	soil_texture = load_texture("textures/zooboing-469-sand-modified.jpg");
 	marker_texture = load_texture("textures/cross.png");
+	circle_texture = load_texture("textures/circle.png");
 
 	/* load heightmap */
 	SDL_Surface *hm = IMG_Load("heightmap.png");
@@ -200,8 +209,11 @@ void Scene::events() {
 					case SDL_BUTTON_RIGHT:
 						if(dialog)
 							CEGUI::System::getSingleton().injectMouseButtonUp(CEGUI::RightButton);
-						else
+						else {
 							show_selection = false;
+							delete selection_particles;
+							selection_particles = NULL;
+						}
 						break;
 					case SDL_BUTTON_WHEELUP:
 						if(dialog)
@@ -397,6 +409,71 @@ void Scene::render() {
 		do_select = false;
 		selected = Vector3(px, py, pz);
 		show_selection = true;
+		if(selection_particles)
+			delete selection_particles;
+		selection_particles = new ParticleGroup<SelectionParticle>(selected, Vector3(0, 1, 0), 1000);
+	}
+
+	float pdist;
+	if(selection_particles && (pdist = (selected.xz() - pos.xz()).length()) < 100) {
+		Quadtree::QuadNode *node = qt->find(selected.x, selected.z);
+		selected.y = node->get_height(selected.x, selected.z);
+		selection_particles->src = selected;
+		glPushMatrix();
+		glTranslatef(selection_particles->src.x, selection_particles->src.y, selection_particles->src.z);
+		GLdouble m[16];
+		glGetDoublev(GL_MODELVIEW_MATRIX, m);
+		Vector3 up(m[0], m[4], m[8]);
+		Vector3 right(m[1], m[5], m[9]);
+		GLdouble temp[3] = {m[3], m[7], m[11]};
+		m[3] = m[12];
+		m[7] = m[13];
+		m[11] = m[14];
+		m[12] = temp[0];
+		m[13] = temp[1];
+		m[14] = temp[2];
+		m[0] = 1; m[4] = 0; m[8] = 0;
+		m[1] = 0; m[5] = 1; m[9] = 0;
+		m[2] = 0; m[6] = 0; m[10] = 1;
+		//glLoadMatrixd(m);
+		//glRotatef(yaw*180/M_PI, 0, 1, 0);
+		//glTranslatef(selection_particles->src.x, selection_particles->src.y, selection_particles->src.z);
+		//glRotatef(-yaw*180/M_PI, 0, 1, 0);
+		//glRotatef(-yaw*180/M_PI+90, 0, 1, 0);
+
+		glDepthMask(GL_FALSE);
+		selection_particles->update(steps);
+		selection_program.use();
+		GLint dist = glGetUniformLocation(selection_program.get_program(), "dist");
+		glUniform1f(dist, pdist);
+		glPointSize(100);
+		const GLfloat att[3] = {1, .01, 0};
+		glPointParameterfv(GL_POINT_DISTANCE_ATTENUATION, att);
+		glEnable(GL_VERTEX_PROGRAM_POINT_SIZE);
+		glEnable(GL_POINT_SPRITE);
+		glEnable(GL_BLEND);
+		//glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+		//glBlendFunc(GL_SRC_ALPHA, GL_DST_ALPHA);
+		glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
+		glEnable(GL_TEXTURE_2D);
+		glBindTexture(GL_TEXTURE_2D, circle_texture);
+		glTexEnvi(GL_POINT_SPRITE, GL_COORD_REPLACE, GL_TRUE);
+		glVertexPointer(4, GL_FLOAT, 0, selection_particles->vertices);
+		glEnableClientState(GL_VERTEX_ARRAY);
+		glDrawArrays(GL_POINTS, 0, selection_particles->count);
+		glDisableClientState(GL_VERTEX_ARRAY);
+		//glBegin(GL_QUADS);
+		/*glBegin(GL_POINTS);
+		for(std::list<Particle>::iterator it = selection_particles->particles.begin(); it != selection_particles->particles.end(); it++) {
+			glColor4f(1, 1, 1, it->alpha);
+			glVertex3f(it->pos.x, it->pos.y, it->pos.z);
+		}
+		glEnd();*/
+		glDisable(GL_TEXTURE_2D);
+		glDisable(GL_BLEND);
+		glUseProgram(0);
+		glDepthMask(GL_TRUE);
+		glPopMatrix();
 	}
 
 	video::ortho();
@@ -413,6 +490,10 @@ void Scene::render() {
 	font->Render(move_str.c_str());
 	glTranslatef(0, -height, 0);
 	font->Render(selected.str().c_str());
+	if(selection_particles) {
+		glTranslatef(0, -height, 0);
+		font->Render((boost::format("particles: %d") % selection_particles->count).str().c_str());
+	}
 	/*if(selected) {
 		glTranslatef(0, height, 0);
 		//font->Render((boost::format("(%s %s %s %s)") % selected->a->str() % selected->b->str() % selected->c->str() % selected->d->str()).str().c_str());
-- 
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