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camera.cpp

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/*
        Dodge This, ClanLib example Game,
        Copyright 1999-2000 by the Dodge This Development Team.

        This game is licensed under the GNU PUBLIC LICENSE (GPL), version 2.
*/

#include "API/gl.h"
#include <math.h>

//#include "API/gl.h"

#include "API/GL/camera.h"
#include "API/GL/viewpoint.h"
#include "API/Display/Display/display.h"

CL_Camera::CL_Camera()
{
        nearZ = 0;
        farZ = 0;
        fov = 0;
}

CL_Camera::CL_Camera(
        float nearZ,
        float farZ,
        float fov)
{
        this->nearZ = nearZ;
        this->farZ = farZ;
        this->fov = fov;
}

void CL_Camera::set_viewport(const CL_Viewpoint &vp, float dist) const
{
        float ratio = CL_Display::get_width() / (float) CL_Display::get_height();

        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();                       
        gluPerspective(
                fov,                   // field of view
                ratio,                 // aspect ratio
                nearZ,                 // near clipping plane
                farZ);                 // far clipping plane

        glMatrixMode(GL_MODELVIEW);
        glLoadIdentity();                       

        gluLookAt(
                // position
                vp.pos.x - dist * vp.dir.x,
                vp.pos.y - dist * vp.dir.y,
                vp.pos.z - dist * vp.dir.z,
                // center
                vp.pos.x,
                vp.pos.y,
                vp.pos.z,
                // up
                vp.up.x,
                vp.up.y,
                vp.up.z);
}

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