using System.Collections; using System.Collections.Generic; using UnityEngine; public class ShowGrid : MonoBehaviour { public int lineCount = 80; public float radius = 4f; static Material lineMaterial; public void OnRenderObject() { CreateLineMaterial(); // Apply the line material lineMaterial.SetPass(0); GL.PushMatrix(); // Set transformation matrix for drawing to // match our transform GL.MultMatrix(transform.localToWorldMatrix); // Draw lines GL.Begin(GL.LINES); for (int i = 0; i < lineCount; ++i) { float a = i / (float)lineCount; float angle = a * Mathf.PI * 2; // Vertex colors change from red to green GL.Color(new Color(a, 1 - a, 0, 0.8F)); // One vertex at transform position GL.Vertex3(0, 0, 0); // Another vertex at edge of circle GL.Vertex3(Mathf.Cos(angle) * radius, Mathf.Sin(angle) * radius, 0); } GL.End(); GL.PopMatrix(); } void OnPostRender() { // Set your materials GL.PushMatrix(); // yourMaterial.SetPass( ); // Draw your stuff GL.PopMatrix(); } 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); } } }