blurrednormalmap.hpp

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#ifndef __NORMALMAP__
#define __NORMALMAP__

#include <tucano/tucano.hpp>

namespace Tucano
{
namespace Effects
{

class BlurredNormalMap : public Tucano::Effect
{

public:

    BlurredNormalMap (void){}

    virtual void initialize (void)
    {
        // searches in default shader directory (/shaders) for shader files normalmap.(vert,frag,geom,comp)
        loadShader(normalmap_shader, "normalmap");
        loadShader(blur_shader, "meanfilter");
        quad.createQuad();
    }

    virtual void render (Tucano::Mesh& mesh, const Tucano::Trackball& cameraTrackball)
    {
        Eigen::Vector4f viewport = cameraTrackball.getViewport();
        glViewport(viewport[0], viewport[1], viewport[2], viewport[3]);


        if (fbo.getWidth() != (viewport[2]-viewport[1]) || fbo.getHeight() != (viewport[3]-viewport[1]))
        {
            fbo.create(viewport[2]-viewport[1], viewport[3]-viewport[1], 1);
        }

        // sets the FBO first (and only) attachment as output
        fbo.clearAttachments();
        fbo.bindRenderBuffer(0);

        normalmap_shader.bind();

        // sets all uniform variables for the phong shader
        normalmap_shader.setUniform("projectionMatrix", cameraTrackball.getProjectionMatrix());
        normalmap_shader.setUniform("modelMatrix", mesh.getModelMatrix());
        normalmap_shader.setUniform("viewMatrix", cameraTrackball.getViewMatrix());

        mesh.setAttributeLocation(normalmap_shader);

        glEnable(GL_DEPTH_TEST);
        mesh.render();
        glDisable(GL_DEPTH_TEST);

        normalmap_shader.unbind();


        // *** unbind the buffer as output buffer, and applies the blur filter ****
        fbo.unbind(); // automatically returns the draw buffer to GL_BACK

        blur_shader.bind();
        blur_shader.setUniform("imageTexture", fbo.bindAttachment(0));
        blur_shader.setUniform("kernelsize", 5);
        quad.render();
        blur_shader.unbind();
        fbo.unbindAttachments();
    }

private:

    Tucano::Shader normalmap_shader;
    Tucano::Shader blur_shader;
    Tucano::Mesh quad;
    Tucano::Framebuffer fbo;
};
}
}



#endif