95 lines
2.6 KiB
C#
95 lines
2.6 KiB
C#
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/*==============================================================================
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Copyright (c) 2018 PTC Inc. All Rights Reserved.
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Confidential and Proprietary - Protected under copyright and other laws.
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Vuforia is a trademark of PTC Inc., registered in the United States and other
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countries.
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==============================================================================*/
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using UnityEngine;
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using Vuforia;
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/// <summary>
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/// A component that renders a bounding box using lines.
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/// </summary>
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public class BoundingBoxRenderer : MonoBehaviour
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{
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#region PRIVATE_MEMBERS
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private Material mLineMaterial = null;
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#endregion // PRIVATE_MEMBERS
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private void OnRenderObject()
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{
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GL.PushMatrix();
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GL.MultMatrix(transform.localToWorldMatrix);
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if (mLineMaterial == null)
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{
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// We "borrow" the default material from a primitive.
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// This ensures that, even on mobile platforms,
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// we always get a valid material at runtime,
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// as on mobile Unity can strip away unused shaders at build-time.
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var tempObj = GameObject.CreatePrimitive(PrimitiveType.Cube);
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var cubeRenderer = tempObj.GetComponent<MeshRenderer>();
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mLineMaterial = new Material(cubeRenderer.material);
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mLineMaterial.color = Color.white;
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Destroy(tempObj);
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}
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mLineMaterial.SetPass(0);
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mLineMaterial.color = Color.white;
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GL.Begin(GL.LINES);
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// Bottom XZ quad
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GL.Vertex3(-0.5f, -0.5f, -0.5f);
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GL.Vertex3( 0.5f, -0.5f, -0.5f);
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GL.Vertex3(0.5f, -0.5f, -0.5f);
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GL.Vertex3(0.5f, -0.5f, 0.5f);
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GL.Vertex3( 0.5f, -0.5f, 0.5f);
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GL.Vertex3(-0.5f, -0.5f, 0.5f);
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GL.Vertex3(-0.5f, -0.5f, 0.5f);
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GL.Vertex3(-0.5f, -0.5f, -0.5f);
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// Top XZ quad
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GL.Vertex3(-0.5f, 0.5f, -0.5f);
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GL.Vertex3(0.5f, 0.5f, -0.5f);
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GL.Vertex3(0.5f, 0.5f, -0.5f);
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GL.Vertex3(0.5f, 0.5f, 0.5f);
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GL.Vertex3(0.5f, 0.5f, 0.5f);
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GL.Vertex3(-0.5f, 0.5f, 0.5f);
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GL.Vertex3(-0.5f, 0.5f, 0.5f);
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GL.Vertex3(-0.5f, 0.5f, -0.5f);
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// Side lines
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GL.Vertex3(-0.5f, -0.5f, -0.5f);
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GL.Vertex3(-0.5f, 0.5f, -0.5f);
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GL.Vertex3(0.5f, -0.5f, -0.5f);
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GL.Vertex3(0.5f, 0.5f, -0.5f);
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GL.Vertex3(0.5f, -0.5f, 0.5f);
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GL.Vertex3(0.5f, 0.5f, 0.5f);
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GL.Vertex3(-0.5f, -0.5f, 0.5f);
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GL.Vertex3(-0.5f, 0.5f, 0.5f);
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GL.End();
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GL.PopMatrix();
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}
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}
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