From 9ba0e3bb0c25fb745ebf42d5a6d7c11772b23358 Mon Sep 17 00:00:00 2001
From: Mark Peng <peng.markv@gmail.com>
Date: Thu, 1 Aug 2013 13:03:17 -0700
Subject: [PATCH] Add reference lines to mouse voxel when adding/deleting
 voxels.

---
 interface/src/Application.cpp |  3 ++-
 interface/src/Util.cpp        | 26 ++++++++++++++++++++++++++
 interface/src/Util.h          |  3 ++-
 3 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/interface/src/Application.cpp b/interface/src/Application.cpp
index 9b292b3d50..7fc9bd7ac8 100644
--- a/interface/src/Application.cpp
+++ b/interface/src/Application.cpp
@@ -2676,13 +2676,14 @@ void Application::displaySide(Camera& whichCamera) {
     if (_mouseVoxel.s != 0) {
         glDisable(GL_LIGHTING);
         glPushMatrix();
+        glScalef(TREE_SCALE, TREE_SCALE, TREE_SCALE);
+        renderMouseVoxelGrid(_mouseVoxel.x, _mouseVoxel.y, _mouseVoxel.z, _mouseVoxel.s);
         if (_addVoxelMode->isChecked()) {
             // use a contrasting color so that we can see what we're doing
             glColor3ub(_mouseVoxel.red + 128, _mouseVoxel.green + 128, _mouseVoxel.blue + 128);
         } else {
             glColor3ub(_mouseVoxel.red, _mouseVoxel.green, _mouseVoxel.blue);
         }
-        glScalef(TREE_SCALE, TREE_SCALE, TREE_SCALE);
         glTranslatef(_mouseVoxel.x + _mouseVoxel.s*0.5f,
                      _mouseVoxel.y + _mouseVoxel.s*0.5f,
                      _mouseVoxel.z + _mouseVoxel.s*0.5f);
diff --git a/interface/src/Util.cpp b/interface/src/Util.cpp
index 0f2c3a8955..d2f9e56462 100644
--- a/interface/src/Util.cpp
+++ b/interface/src/Util.cpp
@@ -365,7 +365,33 @@ void renderGroundPlaneGrid(float size, float impact) {
     glEnd();
 }
 
+void renderMouseVoxelGrid(const float& mouseVoxelX, const float& mouseVoxelY, const float& mouseVoxelZ, const float& mouseVoxelS) {
+    glm::vec3 origin = glm::vec3(mouseVoxelX, mouseVoxelY, mouseVoxelZ);
 
+    glLineWidth(3.0);
+    
+    const int HALF_GRID_DIMENSIONS = 4;
+    glBegin(GL_LINES);
+
+    glm::vec3 xColor(0.0, 0.6, 0.0);
+    glColor3fv(&xColor.x);
+
+    glVertex3f(origin.x + HALF_GRID_DIMENSIONS * mouseVoxelS, 0, origin.z);
+    glVertex3f(origin.x - HALF_GRID_DIMENSIONS * mouseVoxelS, 0, origin.z);
+
+    glm::vec3 zColor(0.0, 0.0, 0.6);
+    glColor3fv(&zColor.x);
+
+    glVertex3f(origin.x, 0, origin.z + HALF_GRID_DIMENSIONS * mouseVoxelS);
+    glVertex3f(origin.x, 0, origin.z - HALF_GRID_DIMENSIONS * mouseVoxelS);
+
+    glm::vec3 yColor(0.6, 0.0, 0.0);
+    glColor3fv(&yColor.x);
+
+    glVertex3f(origin.x, 0, origin.z);
+    glVertex3f(origin.x, origin.y, origin.z);
+    glEnd();
+}
 
 void renderDiskShadow(glm::vec3 position, glm::vec3 upDirection, float radius, float darkness) {
 
diff --git a/interface/src/Util.h b/interface/src/Util.h
index fe59637a42..67ffebf4b3 100644
--- a/interface/src/Util.h
+++ b/interface/src/Util.h
@@ -59,8 +59,9 @@ double diffclock(timeval *clock1,timeval *clock2);
 
 void renderGroundPlaneGrid(float size, float impact);
 
-void renderCollisionOverlay(int width, int height, float magnitude);
+void renderMouseVoxelGrid(const float& mouseVoxelX, const float& mouseVoxelY, const float& mouseVoxelZ, const float& mouseVoxelS);
 
+void renderCollisionOverlay(int width, int height, float magnitude);
 
 void renderDiskShadow(glm::vec3 position, glm::vec3 upDirection, float radius, float darkness);