//-------------------------------------------------------------------------

//

//  File: Cloud2.m

//

//  Abstract: Cloud 2 GLSL Exhibit

//           

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//-------------------------------------------------------------------------

#import "Cloud2.h"

@implementation Cloud2

- (void) initScale

{

    scale = [[UniformData alloc] init];

    [scale initCurrent:0.6];

    [scale initMax:0.9];

    [scale initMin:0.3];

    [scale initDelta:0.0002];

} // initScale

- (void) setupUniforms

{

    [self initScale];

    glUseProgramObjectARB(programObject);

    glUniform3fARB([self getUniformLocation:programObject uniformName:"LightPos"], 0.0, 0.0, 4.0);

    glUniform1fvARB([self getUniformLocation:programObject uniformName:"Scale"], 1, [scale current]);

    glUniform3fARB([self getUniformLocation:programObject uniformName:"SkyColor"], 0.0, 0.0, 0.8);

    glUniform3fARB([self getUniformLocation:programObject uniformName:"CloudColor"], 0.8, 0.8, 0.8);

    glUniform1iARB([self getUniformLocation:programObject uniformName:"Noise"], 0);

} // setupUniforms

- (void) initLazy

{

    [super initLazy];

    // Setup GLSL

    // Here we get a new model

    model = [[Models alloc] init];

    // noise texture

    noiseTexture = [self loadNoiseTexture];

    // Load vertex and fragment shaders

    [self loadShadersFromResource:@"Cloud2" ];

    // Setup uniforms

    [self setupUniforms];

} // initLazy

- (void) dealloc

{

    glDeleteTextures(1, &noiseTexture);

    [scale dealloc];

    [model dealloc];

    [super dealloc];

} // dealloc

- (NSString *) name

{

    return @"Cloud 2";

} // name

- (NSString *) descriptionFilename

{

    return [appBundle pathForResource: @"Cloud2" ofType: @"rtf"];

} // descriptionFilename

- (void) renderFrame

{

    [super renderFrame];

    glUseProgramObjectARB(programObject);

    [scale animate];

    glUniform1fvARB([self getUniformLocation:programObject uniformName:"Scale"], 1, [scale current]);

    glBindTexture(GL_TEXTURE_3D, noiseTexture);

    [model drawModel:kModelSolidTeapot];

    glUseProgramObjectARB(NULL);

} // renderFrame

@end