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/*
view.cc
This file is part of the Osirion project and is distributed under
the terms and conditions of the GNU General Public License version 2
*/
#include "client/client.h"
#include "client/shipdrawer.h"
#include "client/stardrawer.h"
#include "render/render.h"
#include "game/game.h"
#include "sys/sys.h"
#include "math/mathlib.h"
using namespace render;
namespace client
{
ShipDrawer *shipdrawer = 0;
StarDrawer *stardrawer = 0;
game::Ship *target = 0; // the view's target
void View::init() {
// draw scene
if (!shipdrawer) {
stardrawer = new StarDrawer(&game.star);
shipdrawer = new ShipDrawer(&game.ship);
target = &game.ship;
}
}
void View::shutdown()
{
delete stardrawer;
stardrawer = 0;
delete shipdrawer;
shipdrawer = 0;
}
void View::reset() {
// Our shading model--Gouraud (smooth).
gl::shademodel(GL_SMOOTH);
// Culling
gl::cullface( GL_BACK );
gl::frontface(GL_CCW );
}
void View::draw_world(float elapsed)
{
gl::enable( GL_CULL_FACE );
// Depth buffer writing
gl::depthmask(GL_TRUE);
gl::enable(GL_DEPTH_TEST);
// draw the world
gl::push();
gl::translate(game.ship.location - target->location);
gl::scale(0.2f, 0.2f, 0.2f);
shipdrawer->draw(elapsed);
gl::pop();
gl::push();
gl::translate(game.star.location - target->location);
stardrawer->draw(elapsed);
gl::pop();
gl::disable( GL_CULL_FACE );
}
void View::draw_background(float elapsed)
{
using namespace gl;
// enable Alpha blending
gl::blendfunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
gl::enable(GL_BLEND);
// galactic axis
begin(Lines);
color(0.9f, 0.5f, 0.0f);
vertex(-2,0,0);
color(1.0f, 1.0f, 0.0f);
vertex(2,0,0);
vertex(0,0,-0.5);
vertex(0,0,0.5);
vertex(0,1.0f,0);
vertex(0,-1, 0);
end();
int gridsize = 32;
float s = 1.0f / gridsize;
float y = -4.0f;
float dx = target->location.x - floorf(target->location.x);
float dz = target->location.z - floorf(target->location.z);
color(0,0, 1.0f);
begin(Lines);
for (int i=-gridsize; i <= gridsize; i++) {
color(0,0, 0, 0);
vertex(i-dx, y, -gridsize-dz);
color(0,0, (gridsize-abs(i))*s, (gridsize-abs(i))*s);
vertex(i-dx, y, -dz);
vertex(i-dx, y, -dz);
color(0,0, 0, 0);
vertex(i-dx, y, gridsize-dz);
vertex(-gridsize-dx, y, i-dz);
color(0,0, (gridsize-abs(i))*s, (gridsize-abs(i))*s);
vertex(-dx, y, i-dz);
vertex(-dx, y, i-dz);
color(0,0, 0, 0);
vertex(gridsize-dx, y, i-dz);
}
end();
gl::disable(GL_BLEND);
gl::disable(GL_DEPTH_TEST);
}
void View::draw(float elapsed)
{
// Clear the color and depth buffers.
gl::clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
// Change to the projection matrix and set our viewing volume.
gl::matrixmode( GL_PROJECTION );
gl::loadidentity();
//glu::perspective( 64.0, video::ratio, 1.0, 1024.0 );
const float frustumsize = 0.5f;
x = -frustumsize * video.ratio;
width = video.ratio;
y = -frustumsize;
height = 1;
//gl::frustum( -frustumsize * video.ratio, frustumsize * video.ratio, -frustumsize, frustumsize, 1.0f, 1024.0f);
gl::frustum(x, x+width, y, y +height, 1.0f, 1024.0f);
gl::matrixmode( GL_MODELVIEW );
gl::loadidentity();
gl::rotate(90.0f, 0, 1.0, 0);
// Camera transformation
camera.draw(elapsed);
// draw the world
draw_world(elapsed);
// draw the semi-static background
draw_background(elapsed);
// switch to ortographic projection to draw the GUI
gl::matrixmode( GL_PROJECTION );
gl::loadidentity();
glOrtho(0, video.width, video.height, 0, -1000.0f, 1000.0f);
gl::matrixmode( GL_MODELVIEW );
gl::loadidentity();
// draw the console
console.draw();
}
} // namespace view
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