Hi,
I'm trying to bind a simple GL shader in SceneKit. I have shaders that get called but can't seem to bind the texture coordinates. This is what I have for the texture binding:
program.setSemantic(SCNModelViewProjectionTransform, forSymbol: "modelViewProjection", options: nil)
program.setSemantic(SCNGeometrySource.Semantic.vertex.rawValue, forSymbol: "position", options: nil)
program.setSemantic(SCNGeometrySource.Semantic.texcoord.rawValue, forSymbol: "textureCoordinate", options: nil)
material.handleBinding(ofSymbol: "blobTexture", handler: { (programId:UInt32, location:UInt32, node:SCNNode?, renderer:SCNRenderer) in
let imagePath = Bundle.main.path(forResource: "checkerboard", ofType: "png")!
if let cgiImg = UIImage(contentsOfFile: imagePath)?.cgImage {
do {
let _ = try GLKTextureLoader.texture(with: cgiImg, options: nil)
// glBindTexture(GLenum(GL_TEXTURE_2D), texture.name)
glUniform1i(GLint(location), 1)
} catch {
print("Texture not loaded", (error))
}
}
})
Should I use glUniform1i instead of glBindTexture? glBindTexture doesn't seem to work. When I use glUniform the model is the color from a single texel.
These are the shaders:
uniform sampler2D blobTexture;
varying vec2 texCoord;
void main(void) {
gl_FragColor = texture2D(blobTexture, texCoord);
}
and
precision mediump float;
attribute vec4 position;
attribute vec2 textureCoordinate;
uniform mat4 modelViewProjection;
varying vec2 texCoord;
void main(void) {
texCoord = textureCoordinate;
gl_Position = modelViewProjection * position;
}
