heady stratus
I'm trying to use txt files instead of just having the shader code in the code :)
But I get some odd errors I can't find much about:
glerror 1281 and glerror 1282
This is my shader code:
fragmentShader.txt
"""
precision mediump float; //we don't need high precision floats for fragments
uniform vec4 color; // a constant color to apply to all pixels
void main() { // The entry point for our fragment shader.
gl_FragColor = color; // Pass the color directly through the pipeline.
}
"""
vertexShader.txt
"""
uniform mat4 modelViewProjection; // A constant representing the combined model/view/projection matrix.
attribute vec4 position; // Per-vertex position information that we will pass in.
void main() { // The entry point for our vertex shader.
gl_Position = modelViewProjection // gl_Position is a special variable used to store the final position.
* position; // Multiply the vertex by the matrix to get the final point in normalized screen coordinates.
gl_PointSize = 8.0; //pixel width of points
}
"""
Heres how I try to load it:
GLManager.kt
private const val vertexShaderPath = "shaders/vertexShader.txt"
private const val fragmentShaderPath = "shaders/fragmentShader.txt"
fun buildProgram() {
val vertex = compileShader(GLES20.GL_VERTEX_SHADER, vertexShaderPath)
val fragment = compileShader(GLES20.GL_FRAGMENT_SHADER, fragmentShaderPath)
glProgramHandle = linkShaders(vertex, fragment)
GLES20.glDeleteShader(vertex)
GLES20.glDeleteShader(fragment)
positionAttributeHandle = GLES20.glGetAttribLocation(glProgramHandle, "position")
colorUniformHandle = GLES20.glGetUniformLocation(glProgramHandle, "color")
MVPMatrixHandle = GLES20.glGetUniformLocation(glProgramHandle, "modelViewProjection");
GLES20.glUseProgram(glProgramHandle)
GLES20.glLineWidth(30f)
checkGLError("buildProgram")
}
private fun compileShader(type: Int, shaderPath: String): Int {
assert(type == GLES20.GL_VERTEX_SHADER || type == GLES20.GL_FRAGMENT_SHADER)
val shaderCode : String = engine.getAssets().open(shaderPath).bufferedReader().use {
it.readText()
}
Log.d(TAG, "code: $shaderCode")
val handle = GLES20.glCreateShader(type)
GLES20.glShaderSource(handle, shaderCode)
GLES20.glCompileShader(handle)
Log.d(TAG, "Shader Compile Log: ${GLES20.glGetShaderInfoLog(handle)}")
checkGLError("compileShader")
return handle
}
rose helm