From 0986cf8f33df8926dd8da67f98ed18f696141313 Mon Sep 17 00:00:00 2001
From: Jon Bergli Heier <snakebite@jvnv.net>
Date: Mon, 11 Apr 2011 22:06:54 +0200
Subject: Draw a selection marker on the terrain.

---
 scene.cpp | 25 +++++++++++++------------
 1 file changed, 13 insertions(+), 12 deletions(-)

(limited to 'scene.cpp')

diff --git a/scene.cpp b/scene.cpp
index 180c90d..f994627 100644
--- a/scene.cpp
+++ b/scene.cpp
@@ -35,12 +35,15 @@ Scene::Scene() {
 	glUniform1i(tex1loc, 1);
 	GLint tex2loc = glGetUniformLocation(terrain_program.get_program(), "tex[2]");
 	glUniform1i(tex2loc, 2);
+	GLint markloc = glGetUniformLocation(terrain_program.get_program(), "marktex");
+	glUniform1i(markloc, 3);
 	glUseProgram(0);
 
 	/* 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");
 
 	/* load heightmap */
 	SDL_Surface *hm = IMG_Load("heightmap.png");
@@ -250,7 +253,6 @@ void Scene::render() {
 	CEGUI::System::getSingleton().injectTimePulse(0.001*(float)steps);
 
 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-	glLoadIdentity();
 	video::persp();
 
 	unsigned char *keystate = SDL_GetKeyState(NULL);
@@ -316,6 +318,13 @@ void Scene::render() {
 	unsigned int chunks_rendered = 0;
 	if(terrain) {
 		terrain_program.use();
+		GLint show_sel = glGetUniformLocation(terrain_program.get_program(), "show_sel");
+		glUniform1i(show_sel, show_selection ? 1 : 0);
+		if(show_selection) {
+			GLint selpos = glGetUniformLocation(terrain_program.get_program(), "selpos");
+			glUniform3f(selpos, selected.x, selected.y, selected.z);
+		}
+
 		glEnable(GL_TEXTURE_2D);
 
 		glActiveTexture(GL_TEXTURE0);
@@ -327,6 +336,9 @@ void Scene::render() {
 		glActiveTexture(GL_TEXTURE2);
 		glBindTexture(GL_TEXTURE_2D, soil_texture);
 
+		glActiveTexture(GL_TEXTURE3);
+		glBindTexture(GL_TEXTURE_2D, marker_texture);
+
 		std::queue<Quadtree::QuadChunk*> q;
 		q.push(qt->root);
 		while(!q.empty()) {
@@ -386,17 +398,6 @@ void Scene::render() {
 		selected = Vector3(px, py, pz);
 		show_selection = true;
 	}
-	if(show_selection) {
-		glColor3f(1, 0, 0);
-		glBegin(GL_TRIANGLE_FAN);
-			glVertex3f(selected.x, selected.y, selected.z);
-			glVertex3f(selected.x+.5, selected.y+1, selected.z-.5);
-			glVertex3f(selected.x+.5, selected.y+1, selected.z+.5);
-			glVertex3f(selected.x-.5, selected.y+1, selected.z+.5);
-			glVertex3f(selected.x-.5, selected.y+1, selected.z-.5);
-			glVertex3f(selected.x+.5, selected.y+1, selected.z-.5);
-		glEnd();
-	}
 
 	video::ortho();
 	float height = font->LineHeight();
-- 
cgit v1.2.3