CODEWITHSUNDEEP
iosopengl-esglsl
The Way
The Way

Reputation: 614

GLSL Shader Error "Constructor calls may not have precision"

GLSL Shader Error ERROR: 0:1: '(' : syntax error: Constructor calls may not have precision

I'm seeing this error with Xcode 6 on an iOS 8 app based on GLPaint demo... (works fine in iOS7)

I also noticed they no longer use the "STRINGIFY" thing in version 1.13 of GLPaint demo.

.vsh

static const char* BaseVS = STRINGIFY
(


attribute highp vec4 inVertex;

uniform highp mat4 MVP;
uniform highp float pointSize;
uniform highp vec4 vertexColor;
uniform highp float brushRotation;

varying highp vec4 color;


void main()
{
    gl_Position = MVP * inVertex;
    gl_PointSize = pointSize;
    color = vertexColor;
}

);

.fsh

static const char* BaseFS = STRINGIFY
(


uniform sampler2D texture;
uniform sampler2D normalMap;
uniform highp float brushRotation;

varying highp vec4 color;
varying highp vec3 normal;
varying highp vec3 lightDir;
varying highp vec3 eyeVec;

precision highp float;

 void main (void)

{


highp float vRotation = (brushRotation/180.0)*3.14;;
highp float mid = 0.5;
highp vec2 rotated = vec2(cos(vRotation) * (gl_PointCoord.x - mid) + sin(vRotation) * (gl_PointCoord.y - mid) + mid,
                    cos(vRotation) * (gl_PointCoord.y - mid) - sin(vRotation) * (gl_PointCoord.x - mid) + mid);
highp vec4 rotatedTexture = texture2D( texture,  rotated);


gl_FragColor = color * rotatedTexture;

}

);

Upvotes: 4

Views: 572

Answers (1)

The Way
The Way

Reputation: 614

The problem was in a method used for random generation. I removed the "high" before the vec2() construction. (Sigh)

 highp float rand(highp vec2 co)
{
    return fract(sin(dot(co.xy ,highp vec2(12.9898,78.233))) * 43758.5453);
}

Upvotes: 3

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