*doc

1 files changed, 135 insertions, 0 deletions

diff --git a/Docs/TAB_DebugRigidBody.txt b/Docs/TAB_DebugRigidBody.txt
new file mode 100644
index 0000000..095c105
--- /dev/null
+++ b/Docs/TAB_DebugRigidBody.txt
@@ -0,0 +1,135 @@
+
+using UnityEngine;
+
+public class DebugRigidBody : MonoBehaviour
+{
+
+    public enum EMode
+    {
+        Axis,
+        Cube,
+    }
+    public EMode mode = EMode.Axis;
+
+    // When added to an object, draws colored rays from the
+    // transform position.
+    public int lineCount = 100;
+    public float radius = 3.0f;
+
+    static Material lineMaterial;
+    static void CreateLineMaterial()
+    {
+        if (!lineMaterial)
+        {
+            // Unity has a built-in shader that is useful for drawing
+            // simple colored things.
+            Shader shader = Shader.Find("Hidden/Internal-Colored");
+            lineMaterial = new Material(shader);
+            lineMaterial.hideFlags = HideFlags.HideAndDontSave;
+            // Turn on alpha blending
+            lineMaterial.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.SrcAlpha);
+            lineMaterial.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha);
+            // Turn backface culling off
+            lineMaterial.SetInt("_Cull", (int)UnityEngine.Rendering.CullMode.Off);
+            // Turn off depth writes
+            lineMaterial.SetInt("_ZWrite", 0);
+        }
+    }
+
+    private void PutVertex(Vector3 vert)
+    {
+        GL.Vertex3(vert.x, vert.y, vert.z);
+    }
+
+    // Will be called after all regular rendering is done
+    public void OnRenderObject()
+    {
+        CreateLineMaterial();
+        // Apply the line material
+        lineMaterial.SetPass(0);
+
+        if (mode == EMode.Axis)
+        {
+            GL.PushMatrix();
+            // Set transformation matrix for drawing to
+            // match our transform
+            GL.MultMatrix(transform.localToWorldMatrix);
+
+            // Draw lines
+            GL.Begin(GL.LINES);
+
+            float len = 0.3f;
+
+            GL.Color(Color.red);
+            PutVertex(Vector3.zero);
+            PutVertex(Vector3.right * len);
+
+            GL.Color(Color.green);
+            PutVertex(Vector3.zero);
+            PutVertex(Vector3.up * len);
+
+            GL.Color(Color.blue);
+            PutVertex(Vector3.zero);
+            PutVertex(Vector3.forward * len);
+
+            GL.End();
+            GL.PopMatrix();
+        }
+        else if (mode == EMode.Cube)
+        {
+            GL.PushMatrix();
+            // Set transformation matrix for drawing to
+            // match our transform
+            GL.MultMatrix(transform.localToWorldMatrix);
+
+            float len = 0.05f;
+
+            GL.wireframe = true;
+
+            GL.Begin(GL.QUADS);
+
+            GL.Color(Color.white);
+
+            GL.Vertex3(len, len, -len);
+            GL.Vertex3(-len, len, -len);
+            GL.Vertex3(-len, len, len);
+            GL.Vertex3(len, len, len);
+
+            // Bottom face (y = -len)
+            GL.Vertex3(len, -len, len);
+            GL.Vertex3(-len, -len, len);
+            GL.Vertex3(-len, -len, -len);
+            GL.Vertex3(len, -len, -len);
+
+            // Front face  (z = len)
+            GL.Vertex3(len, len, len);
+            GL.Vertex3(-len, len, len);
+            GL.Vertex3(-len, -len, len);
+            GL.Vertex3(len, -len, len);
+
+            // Back face (z = -len)
+            GL.Vertex3(len, -len, -len);
+            GL.Vertex3(-len, -len, -len);
+            GL.Vertex3(-len, len, -len);
+            GL.Vertex3(len, len, -len);
+
+            // Left face (x = -len)
+            GL.Vertex3(-len, len, len);
+            GL.Vertex3(-len, len, -len);
+            GL.Vertex3(-len, -len, -len);
+            GL.Vertex3(-len, -len, len);
+
+            // Right face (x = len)
+            GL.Vertex3(len, len, -len);
+            GL.Vertex3(len, len, len);
+            GL.Vertex3(len, -len, len);
+            GL.Vertex3(len, -len, -len);
+            GL.End();  // End of drawing color-cube
+
+            GL.wireframe = false;
+
+            GL.PopMatrix();
+        }
+    }
+
+}