public Box() {
/*
* create the shader program. If OK, create vertex
* and fragment shaders
*/
shader = ARBShaderObjects.glCreateProgramObjectARB();
if (shader != 0) {
vertShader = createVertShader("shaders/hello-gl.v.glsl");
fragShader = createFragShader("shaders/hello-gl.f.glsl");
// skyFragShader=createFragShader("shaders/sky-gl.f.glsl");
} else useShader = false;
/*
* if the vertex and fragment shaders setup sucessfully,
* attach them to the shader program, link the sahder program
* (into the GL context I suppose), and validate
*/
if (vertShader != 0 && fragShader != 0) {
ARBShaderObjects.glAttachObjectARB(shader, vertShader);
ARBShaderObjects.glAttachObjectARB(shader, fragShader);
ARBShaderObjects.glLinkProgramARB(shader);
ARBShaderObjects.glValidateProgramARB(shader);
useShader = printLogInfo(shader, "attach");
} else useShader = false;
}
private static int setupProgram(String vShaderPath, String fShaderPath) {
int program = glCreateProgramObjectARB();
int vShader = 0;
int fShader = 0;
if (program != 0) {
vShader = createVertShader(vShaderPath);
fShader = createFragShader(fShaderPath);
}
if (vShader != 0 || fShader != 0) {
if (vShader != 0) {
glAttachObjectARB(program, vShader);
}
if (fShader != 0) {
glAttachObjectARB(program, fShader);
}
if (entityAttrib >= 0) {
glBindAttribLocationARB(program, entityAttrib, "mc_Entity");
}
glLinkProgramARB(program);
glValidateProgramARB(program);
printLogInfo(program);
} else if (program != 0) {
glDeleteObjectARB(program);
program = 0;
}
return program;
}
public boolean initShader() {
int vertShader = 0, fragShader = 0;
try {
vertShader = this.createShader("./shaders/screen.vert", ARBVertexShader.GL_VERTEX_SHADER_ARB);
fragShader =
this.createShader("./shaders/screen.frag", ARBFragmentShader.GL_FRAGMENT_SHADER_ARB);
} catch (final Exception exc) {
exc.printStackTrace();
return false;
} finally {
if ((vertShader == 0) || (fragShader == 0)) {
return false;
}
}
this.program = ARBShaderObjects.glCreateProgramObjectARB();
if (this.program == 0) {
return false;
}
ARBShaderObjects.glAttachObjectARB(this.program, vertShader);
ARBShaderObjects.glAttachObjectARB(this.program, fragShader);
ARBShaderObjects.glLinkProgramARB(this.program);
if (ARBShaderObjects.glGetObjectParameteriARB(
this.program, ARBShaderObjects.GL_OBJECT_LINK_STATUS_ARB)
== GL11.GL_FALSE) {
System.err.println(this.getLogInfo(this.program));
return false;
}
ARBShaderObjects.glValidateProgramARB(this.program);
if (ARBShaderObjects.glGetObjectParameteriARB(
this.program, ARBShaderObjects.GL_OBJECT_VALIDATE_STATUS_ARB)
== GL11.GL_FALSE) {
System.err.println(this.getLogInfo(this.program));
return false;
}
return true;
}