Hi,
Shadertoy to PlayCanvas: Shader - Shadertoy BETA
Project: https://playcanvas.com/project/677852/overview/a-river--by-raymarching
Build: A River - by raymarching - PLAYCANVAS
Feel free to fork.
Regards,
Saad
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Yes, really great job porting that to PlayCanvas! There’s a lot of great code to grab on Shadertoy!
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Hmm… The Shadertoy link works on my iPhone XS, but the PlayCanvas build does not. I guess some techniques were used in PlayCanvas that are not supported by the phone?
@Excess Hmmm, interesting. You’re right. But it does work if you enabled WebGL 2.0 on the iPhone XS:
Somebody would have to remote debug in Safari on macOS to figure out what the problem is. I only have a PC unfortunately.
Well, here are the errors thrown if I play through the editor. Don’t know if that’s of any use:
ERROR: 0:98: 'texture' : no matching overloaded function found
ERROR: 0:98: 'xyz' : field selection requires structure or vector on left hand side
ERROR: 0:98: '=' : dimension mismatch
ERROR: 0:98: '=' : cannot convert from 'const mediump float' to 'highp 3-component vector of float'
ERROR: 0:100: 'texture' : no matching overloaded function found
ERROR: 0:100: 'xyz' : field selection requires structure or vector on left hand side
ERROR: 0:100: '=' : dimension mismatch
ERROR: 0:100: '=' : cannot convert from 'const mediump float' to 'highp 3-component vector of float'
ERROR: 0:102: 'texture' : no matching overloaded function found
ERROR: 0:102: 'xyz' : field selection requires structure or vector on left hand side
ERROR: 0:102: '=' : dimension mismatch
ERROR: 0:102: '=' : cannot convert from 'const mediump float' to 'highp 3-component vector of float'
ERROR: 0:152: 'texture' : no matching overloaded function found
ERROR: 0:152: 'xyz' : field selection requires structure or vector on left hand side
ERROR: 0:152: '=' : dimension mismatch
ERROR: 0:152: '=' : cannot convert from 'highp float' to 'highp 3-component vector of float'
Error in material "New Material" with flags 65548
null is not an object (evaluating 'shader.samplers')
Okay, problem solved:
https://playcanvas.com/project/677902/overview/a-river--ios-fix
Apparently, texture is not recognized as the proper syntax in WebGL1 so I simply changed all occurrences of it to texture2D and the shader started working on my phone.
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