overte/interface/src/voxels/VoxelFade.cpp

//
//  VoxelFade.cpp
//  interface/src/voxels
//
//  Created by Brad Hefta-Gaub on 8/6/13.
//  Copyright 2013 High Fidelity, Inc.
//
//  Distributed under the Apache License, Version 2.0.
//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//

#include "InterfaceConfig.h"

#include <VoxelConstants.h>

#include "Application.h"
#include "VoxelFade.h"
#include "renderer/GlowEffect.h"

const float VoxelFade::FADE_OUT_START =  0.5f;
const float VoxelFade::FADE_OUT_END   =  0.05f;
const float VoxelFade::FADE_OUT_STEP  =  0.9f;
const float VoxelFade::FADE_IN_START  =  0.05f;
const float VoxelFade::FADE_IN_END    =  0.5f;
const float VoxelFade::FADE_IN_STEP   =  1.1f;
const float VoxelFade::DEFAULT_RED    =  0.5f;
const float VoxelFade::DEFAULT_GREEN  =  0.5f;
const float VoxelFade::DEFAULT_BLUE   =  0.5f;

VoxelFade::VoxelFade(FadeDirection direction, float red, float green, float blue) :
    direction(direction),
    red(red),
    green(green),
    blue(blue)
{
    opacity = (direction == FADE_OUT) ? FADE_OUT_START : FADE_IN_START;
}

void VoxelFade::render() {
    DependencyManager::get<GlowEffect>()->begin();

    glDisable(GL_LIGHTING);
    glPushMatrix();
    glScalef(TREE_SCALE, TREE_SCALE, TREE_SCALE);
    glColor4f(red, green, blue, opacity);
    glTranslatef(voxelDetails.x + voxelDetails.s * 0.5f,
                 voxelDetails.y + voxelDetails.s * 0.5f,
                 voxelDetails.z + voxelDetails.s * 0.5f);
    glLineWidth(1.0f);
    glutSolidCube(voxelDetails.s);
    glLineWidth(1.0f);
    glPopMatrix();
    glEnable(GL_LIGHTING);
    
    
    DependencyManager::get<GlowEffect>()->end();
    
    opacity *= (direction == FADE_OUT) ? FADE_OUT_STEP : FADE_IN_STEP;
}

bool VoxelFade::isDone() const {
    if (direction == FADE_OUT) {
        return opacity <= FADE_OUT_END;
    } else {
        return opacity >= FADE_IN_END;
    }
    return true; // unexpected case, assume we're done
}