init

oak_tree/materials/scripts/caster_fp.glsl

@@ -0,0 +1,16 @@
+varying vec4 vertex_depth;
+
+uniform sampler2D tex;
+varying vec2 uv;
+
+void main()
+{
+  if (texture2D(tex, uv).a < 0.5)
+  {
+    discard;
+  }
+
+  float depth = (vertex_depth.z) / vertex_depth.w;
+
+  gl_FragColor = vec4(depth, depth, depth, 1.0);
+}

oak_tree/materials/scripts/caster_vp.glsl

@@ -0,0 +1,16 @@
+uniform mat4 world_view_proj_mat;
+uniform vec4 texel_offsets;
+
+varying vec4 vertex_depth;
+
+varying vec2 uv;
+
+void main()
+{
+  vertex_depth = world_view_proj_mat * gl_Vertex;
+  gl_Position = vertex_depth;
+  gl_Position.xy += texel_offsets.zw * gl_Position.w;
+
+  uv = gl_MultiTexCoord0.xy;
+}
+

oak_tree/materials/scripts/oak_tree.material

@@ -0,0 +1,86 @@
+material OakTree/Branch
+{
+  technique
+  {
+    shadow_caster_material "OakTree/shadow_caster_alpha"
+
+    pass
+    {
+      alpha_rejection greater 128
+
+      texture_unit
+      {
+        texture branch_diffuse.png
+      }
+    }
+  }
+}
+
+material OakTree/Bark
+{
+  technique
+  {
+    pass
+    {
+      texture_unit
+      {
+        texture bark_diffuse.png
+      }
+    }
+  }
+}
+
+vertex_program caster_vp_glsl glsl
+{
+  source caster_vp.glsl
+
+  default_params
+  {
+    param_named_auto world_view_proj_mat worldviewproj_matrix
+    param_named_auto texel_offsets texel_offsets
+  }
+
+}
+
+fragment_program caster_fp_glsl glsl
+{
+  source caster_fp.glsl
+
+  default_params
+  {
+    param_named tex int 0
+  }
+}
+
+
+material OakTree/shadow_caster_alpha
+{
+  transparency_casts_shadows on
+  technique
+  {
+    pass
+    {
+      // See: viewtopic.php?f=3&t=44817
+      fog_override true
+
+      cull_hardware none
+      cull_software none
+
+      alpha_rejection always_pass
+
+      vertex_program_ref caster_vp_glsl
+      {
+      }
+
+      fragment_program_ref caster_fp_glsl
+      {
+      }
+
+      texture_unit tex
+      {
+        // Pass the texture with alpha channel to the caster
+        texture branch_diffuse.png
+      }
+    }
+  }
+}

oak_tree/model.config

@@ -0,0 +1,16 @@
+<?xml version="1.0"?>
+
+<model>
+  <name>Oak tree</name>
+  <version>1.0</version>
+  <sdf version="1.6">model.sdf</sdf>
+
+  <author>
+    <name>Louise Poubel</name>
+    <email>louise@osrfoundation.org</email>
+  </author>
+
+  <description>
+    An oak tree.
+  </description>
+</model>

oak_tree/model.sdf

@@ -0,0 +1,49 @@
+<?xml version="1.0" ?>
+<sdf version="1.6">
+  <model name="oak_tree">
+    <static>true</static>
+    <link name="link">
+      <collision name="collision">
+        <geometry>
+          <mesh>
+            <uri>model://oak_tree/meshes/oak_tree.dae</uri>
+          </mesh>
+        </geometry>
+      </collision>
+      <visual name="branch">
+        <geometry>
+          <mesh>
+            <uri>model://oak_tree/meshes/oak_tree.dae</uri>
+            <submesh>
+              <name>Branch</name>
+            </submesh>
+          </mesh>
+        </geometry>
+        <material>
+          <script>
+            <uri>model://oak_tree/materials/scripts/</uri>
+            <uri>model://oak_tree/materials/textures/</uri>
+            <name>OakTree/Branch</name>
+          </script>
+        </material>
+      </visual>
+      <visual name="bark">
+        <geometry>
+          <mesh>
+            <uri>model://oak_tree/meshes/oak_tree.dae</uri>
+            <submesh>
+              <name>Bark</name>
+            </submesh>
+          </mesh>
+        </geometry>
+        <material>
+          <script>
+            <uri>model://oak_tree/materials/scripts/</uri>
+            <uri>model://oak_tree/materials/textures/</uri>
+            <name>OakTree/Bark</name>
+          </script>
+        </material>
+      </visual>
+    </link>
+  </model>
+</sdf>