ywwynm / unity-eac-shader Goto Github PK

Hello, thanks for the shader, it saved me a lot of time.

I had some troubles (half the cubemap needed flip) when I downloaded in 2K (with 4K Video Downloader) that video:
https://www.youtube.com/watch?v=YAABA-Ri0YI&t=219s

in unity 2019.3.a3 it's now perfect (still the line problem on some edges, but I'll work on it soon)

modified shader here (lines 60/62/65/73/74):

1. Shader "Custom/EAC-sphere"
2. {
3. Properties
4. {

5.  _MainTex ("Texture", 2D) = "white" {}
   

6. }
7. SubShader
8. {

9.  // No culling or depth
   

10. 	Cull Front ZWrite Off ZTest Always // Cull front will flip normals
    

12. 	Pass
    

13. 	{
    

14. 		CGPROGRAM
    

15. 		#pragma vertex vert
    

16. 		#pragma fragment frag
    

18. 		#include "UnityCG.cginc"
    

20. 		struct appdata
    

21. 		{
    

22. 	float4 vertex : POSITION;
    

23. 	float3 normal : NORMAL;
    

24. 		};
    

26. 		struct v2f
    

27. 		{
    

28. 	float4 vertex : SV_POSITION;
    

29. 			float3 coord : TEXCOORD0;
    

30. 		};
    

32. 		v2f vert (appdata v)
    

33. 		{
    

34. 			v2f o;
    

35. 			o.vertex = UnityObjectToClipPos(v.vertex);
    

36. 			o.coord = v.normal;
    

37. 			return o;
    

38. 		}
    

40. 		sampler2D _MainTex;
    

42. 		float4 frag (v2f i) : SV_Target {
    

43. 			float pi = UNITY_PI;
    

44. 			float3 xyz = normalize(i.coord);
    

45. 			float x = xyz.x, y = xyz.y, z = xyz.z;
    

47. 			float u = 0, v = 0;
    

48. 			float scale; // sphere coordinates to cube coordinates according to similar-triangle
    

49. 			if (abs(x) >= abs(y) && abs(x) >= abs(z)) {
    

50. 				scale = 1.0 / abs(x); // let's assume that radius of sphere is 1, which means u is 6.0 and v is 4.0
    

51. 				if (x >= 0) { // right
    

52. 					u = 5.0 - 4.0 * atan(z * scale) / pi;
    

53. 					v = 3.0 + 4.0 * atan(y * scale) / pi;
    

54. 				} else { // left
    

55. 					u = 1.0 + 4.0 * atan(z * scale) / pi;
    

56. 					v = 3.0 + 4.0 * atan(y * scale) / pi;
    

57. 				}
    

58. 			} else if (abs(y) >= abs(x) && abs(y) >= abs(z)) {
    

59. 				scale = 1.0 / abs(y);
    

60. 				if (y < 0) { // top                                                                         // < instead of >=
    

61. 					u = 5.0 + 4.0 * atan(z * scale) / pi;
    

62. 					v = 1.0 - 4.0 * atan(x * scale) / pi;                                       // - instead of +
    

63. 				} else { // down
    

64. 					u = 1.0 - 4.0 * atan(z * scale) / pi;
    

65. 					v = 1.0 - 4.0 * atan(x * scale) / pi;                                       // - instead of +
    

66. 				}
    

67. 			} else if (abs(z) >= abs(x) && abs(z) >= abs(y)) {
    

68. 				scale = 1.0 / abs(z);
    

69. 				if (z >= 0) { // front
    

70. 					u = 3.0 + 4.0 * atan(x * scale) / pi;
    

71. 					v = 3.0 + 4.0 * atan(y * scale) / pi;
    

72. 				} else { // end
    

73. 					u = 3.0 - 4.0 * atan(y * scale) / pi;                                       // - instead of +
    

74. 					v = 1.0 - 4.0 * atan(x * scale) / pi;                                       // - instead of +
    

75. 				}
    

76. 			}
    

78. 			return tex2D(_MainTex, float2(u / 6.0, 1.0 - v / 4.0));
    

79. 		}
    

81. 		ENDCG
    

82. 	}
    

83. }
    

84. }

Hello. I have some problems. When I use this shader on sphere, video play fine, but I see some edges like a cube edges. Then I "play" with scale variable (0.99) on u and v and some edges disappear (I dont see them) but not all.