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--- public:t-vien-08-1:lab_3_materials [2008/01/24 01:06] – hannes
+++ public:t-vien-08-1:lab_3_materials [2024/04/29 13:33] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
-====== Lab 3 - Camera, Text, Environment and Sound  ======
+====== Lab 3 - Camera, Text, Sound and Outside Environment======
-===== In-Class Excercises =====
+===== In-Class Exercises =====
 ==== Before You Start ====
@@ Line 7: / Line 7: @@
   * Download and unzip the [[http://www.ru.is/kennarar/hannes/classes/ve2008/Lab3Assets.zip|Lab 3 Asset File]] into your working directory (same directory you used last week)
-==== Continuing with your Virtual Room Project ====
+==== Continuing with your Virtual Room ====
-  * You can continue working where you left off last week on the [[Lab 2 Materials|Making a Virtual Room in Panda 3D]] exercise.
+  * You should continue working where you left off last week on the [[Lab 2 Materials|Making a Virtual Room in Panda 3D]] exercise.
   - **Camera Lens:**\\ Adjust your camera's //field of view// (FOV) and //near clipping distance// so that you see a bit more of the room as you move around in it.  A field of view of **50** seems pretty good and a near clipping plane of **0.01**.<code python>
 base.camLens.setFov(<field of view in degrees>)
-base.camLens.setNear(<distance of near clipping plane>)
+base.camLens.setNear(<distance of near clipping plane - anything closer than this will disappear>)
-base.camLens.setFar(<distance to far clipping plane>)
+base.camLens.setFar(<distance to far clipping plane - anything further than this will disappear>)
 </code>
   - **Onscreen Text:**\\ Add a dynamic text label on your heads-up-display (HUD) simply by creating an **OnscreenText** object like this: <code python>
@@ Line 22: / Line 22: @@
 </code> You can look up the [[http://www.ru.is/kennarar/hannes/useful/PandaManual/OnscreenText.1.html|various creation parameters]] for **OnscreenText**.  And then any time you want to display some text, just set the text property for this object.  The following code sets the text to the current camera location values using a [[http://www.ibiblio.org/obp/pyBiblio/tips/wilson/stringFormat.php|python formatted string]] <code python>
 textobject.setText("Your location is (%2.2f,%2.2f,%2.2f)" % (base.camera.getX(), base.camera.getY(), base.camera.getZ()))
-</code>
+</code>  Make your label show an updated camera position as you move around.
   - **Localized Sound:**\\ Add some sound to the television broadcast which grows louder as you approach the television set and softer as you move away from it.  First you need to create an instance of an **Audio3DManager** inside the **World**.  You can use the **camera** object as the reference point for calculating how far the sound is traveling and therefore how much the volume should drop.  Set the drop off factor to **10**.  Then load the sound **glenn_launch.wav** (from the assets file) and attach it to the television screen.  Set the min distance of the sound to **1.2**.  Make sure to start the sound playing.  Play with different drop off factors and min distance values and see how it affects the sound in the room as you move around. <code python>
 # HINT - Creating a 3D audio manager
@@ Line 45: / Line 45: @@
 tess.setHeightfield(Filename(<filename of hightmap>))
 tess.setVerticalScale(<vertical scale>)
-tess.setHorizontalScale(<vertical scale>)
+tess.setHorizontalScale(<horizontal scale>)
 terrain = tess.generate()
 terrain.reparentTo(render)
 </code>
     - Load the //colormap// texture and apply it to your terrain node.  But first you must generate texture coordinates for your terrain geometry.  You can generate texture coordinates for any geometry in a node by making the following call ''<nodepath>.setTexGen(TextureStage.getDefault(),TexGenAttrib.MWorldPosition)''.  You will also have to scale the texture and center it by using the ''<nodepath>.setTexScale(<texture stage>, <u scale>, <v scale>)'' and ''<nodepath>.setTexOffset(<texture stage>, <u offset>, <v offset>)'' methods.  Good uniform scale would be **1/128**, and centering just involves an offset of -0.5 for both ''u'' and ''v''.
-  - **Skybox:**\\  The sky and the world beyond the terrain is still gray and gloomy.  Surround your entire scene with a box with textures on the inside to replace the gray color with something interesting.  A box like that, with textures depicting a sky already applied, can be found with the name **"Models/skybox.egg"**.  As you can see, this sort of an object is called a //skybox//.  Create a new **''create_skybox''** method in your **''World''** class.  Use it to load the skybox model as the member variable **self.skybox** in your **World** class, attach it to **render** and scale it up 200 times.  A //skybox// represents a horizon that the user should never be able to reach and pass through, and therefore it needs to move with the user, always keeping the user at its center.  This is easy to do since **World** already has a **move** method that updates the camera position.  Once the camera position has been updated in that method, give **self.skybox** the same position as the camera.  Try moving outside of the room and notice how the clouds seems to stay put.
+  - **Skybox:**\\  The sky and the world beyond the terrain is still gray and gloomy.  Surround your entire scene with a box that has textures facing the inside to replace the gray color with something interesting.  A box like that, with textures depicting a sky already applied, can be found with the name **"Models/skybox.egg"**.  As you can see, this sort of an object is called a //skybox//.  Create a new **''create_skybox''** method in your **''World''** class.  Use it to load the skybox model as the member variable **self.skybox** in your **World** class, attach it to **render** and scale it up 200 times.  A //skybox// represents a horizon that the user should never be able to reach and pass through, and therefore it needs to move with the user, always keeping the user at its center.  This is easy to do since **World** already has a **move** method that updates the camera position.  Once the camera position has been updated in that method, give **self.skybox** the same position as the camera.  Try moving outside of the room and notice how the clouds seems to stay put.\\ NOTE: The clouds textures of the //skybox// were rendered using the [[http://www.planetside.co.uk/|Terragen Tool]] with a handy [[http://www.terathon.com/wiki/index.php?title=Making_a_Skybox_Using_Terragen|skybox rendering script]].  You can create your own skies with this tool.  You can replace the textures of ''Models/skybox.egg'' simply by opening the file in a text editor and changing the texture filenames to your files.
   - **Fog:**\\ To add a little bit of an atmosphere, add some fog to your whole scene and play with the values.  Don't make the fog too dense or you won't see much through the windows of your house.<code python>
 # HINT - Adding fog to a sub-tree starting at '<nodepath>'