lazarus/components/aggpas/particle_demo.dpr
mattias 36a2b1ea07 added aggpas
git-svn-id: trunk@21942 -
2009-10-01 12:24:32 +00:00

843 lines
14 KiB
ObjectPascal

//
// AggPas 2.4 RM3 Demo application
// Note: Press F1 key on run to see more info about this demo
//
// Paths: src;src\ctrl;src\svg;src\util;src\platform\win;expat-wrap
//
program
particle_demo ;
{DEFINE DISORDER }
uses
Math ,
agg_basics ,
agg_platform_support ,
agg_ctrl ,
agg_slider_ctrl ,
agg_cbox_ctrl ,
agg_renderer_base ,
agg_rendering_buffer ,
agg_rasterizer_scanline_aa ,
agg_scanline_u ,
agg_color ,
agg_pixfmt ,
agg_pixfmt_rgb ,
agg_pixfmt_rgba ,
agg_renderer_scanline ,
agg_path_storage ,
agg_conv_transform ,
agg_bounding_rect ,
agg_span_allocator ,
agg_span_gradient ,
agg_span_interpolator_linear ,
agg_rasterizer_outline_aa ,
agg_rendering_buffer_dynarow ,
agg_ellipse ,
agg_array ,
agg_gsv_text ,
agg_conv_stroke ,
agg_render_scanlines ,
agg_trans_affine ,
agg_math ;
{$I agg_mode.inc }
const
flip_y = true;
var
g_rasterizer : rasterizer_scanline_aa;
g_scanline : scanline_u8;
g_path : path_storage;
g_npaths : unsigned = 0;
g_x1 : double = 0;
g_y1 : double = 0;
g_x2 : double = 0;
g_y2 : double = 0;
g_base_dx : double = 0;
g_base_dy : double = 0;
g_scale : double = 1.0;
g_skew_x : double = 0;
g_skew_y : double = 0;
g_nclick : int = 0;
g_cx ,g_cy ,g_dx ,g_dy ,g_radius : array[0..999 ] of double;
g_color1 ,g_color2 ,g_color3 : array[0..999 ] of aggclr;
g_gradients : array[0..999 ] of pod_auto_array;
g_angle : double = 0;
g_center : double = 0;
g_dc : double = 0.5;
g_cache : array[0..999 ] of rendering_buffer_dynarow_ptr;
type
gradient_tricolor = object(array_base )
private
m_c1 ,
m_c2 ,
m_c3 ,
m_rc : aggclr;
public
constructor Construct(c1 ,c2 ,c3 : aggclr );
function size : unsigned; virtual;
function array_operator(i : unsigned ) : pointer; virtual;
procedure colors(c1 ,c2 ,c3 : aggclr );
end;
the_application = object(platform_support )
private
m_particles ,
m_speed : slider_ctrl;
m_use_cache ,
m_run : cbox_ctrl;
m_run_flag ,
m_use_cache_flag ,
m_first_time : boolean;
m_particles_value ,
m_speed_value : double;
public
constructor Construct(format_ : pix_format_e; flip_y_ : boolean );
destructor Destruct;
procedure on_init; virtual;
procedure on_draw; virtual;
procedure on_mouse_button_down(x ,y : int; flags : unsigned ); virtual;
procedure on_mouse_move (x ,y : int; flags : unsigned ); virtual;
procedure on_key(x ,y : int; key ,flags : unsigned ); virtual;
procedure on_idle; virtual;
procedure on_ctrl_change; virtual;
end;
{ CONSTRUCT }
constructor gradient_tricolor.Construct(c1 ,c2 ,c3 : aggclr );
begin
m_c1:=c1;
m_c2:=c2;
m_c3:=c3;
end;
{ SIZE }
function gradient_tricolor.size : unsigned;
begin
result:=256;
end;
{ ARRAY_OPERATOR }
function gradient_tricolor.array_operator(i : unsigned ) : pointer;
begin
if i <= 127 then
begin
i:=i * 2;
m_rc.r:=int8u((((m_c2.r - m_c1.r ) * int(i ) ) + (m_c1.r shl 8 ) ) shr 8 );
m_rc.g:=int8u((((m_c2.g - m_c1.g ) * int(i ) ) + (m_c1.g shl 8 ) ) shr 8 );
m_rc.b:=int8u((((m_c2.b - m_c1.b ) * int(i ) ) + (m_c1.b shl 8 ) ) shr 8 );
m_rc.a:=int8u((((m_c2.a - m_c1.a ) * int(i ) ) + (m_c1.a shl 8 ) ) shr 8 );
end
else
begin
i:=(i - 127 ) * 2;
m_rc.r:=int8u((((m_c3.r - m_c2.r ) * int(i ) ) + (m_c2.r shl 8 ) ) shr 8 );
m_rc.g:=int8u((((m_c3.g - m_c2.g ) * int(i ) ) + (m_c2.g shl 8 ) ) shr 8 );
m_rc.b:=int8u((((m_c3.b - m_c2.b ) * int(i ) ) + (m_c2.b shl 8 ) ) shr 8 );
m_rc.a:=int8u((((m_c3.a - m_c2.a ) * int(i ) ) + (m_c2.a shl 8 ) ) shr 8 );
end;
result:=@m_rc;
end;
{ COLORS }
procedure gradient_tricolor.colors(c1 ,c2 ,c3 : aggclr );
begin
m_c1:=c1;
m_c2:=c2;
m_c3:=c3;
end;
{ CONSTRUCT }
constructor the_application.Construct;
var
i : int;
c : aggclr;
begin
inherited Construct(format_ ,flip_y_ );
m_particles.Construct(5 ,5 ,300 ,12 ,not flip_y_ );
m_speed.Construct (5 ,5 + 15 ,300 ,12 + 15 ,not flip_y_ );
m_use_cache.Construct(320 ,5 ,'Use Bitmap Cache' ,not flip_y_ );
m_run.Construct (320 ,5 + 15 ,'Start the Universe!' ,not flip_y_ );
m_run_flag :=true;
m_use_cache_flag:=false;
i:=0;
while i < 1000 do
begin
g_cache[i ]:=NIL;
g_gradients[i ].Construct(256 ,sizeof(aggclr ) );
inc(i );
end;
add_ctrl(@m_particles );
m_particles.range_(10 ,1000 );
m_particles.value_(200 );
m_particles.label_('Number of Particles=%.0f' );
m_particles.no_transform;
m_particles_value:=m_particles._value;
add_ctrl(@m_speed );
m_speed.range_(0.025 ,2.0 );
m_speed.value_(1.0 );
m_speed.label_('Dark Energy=%.3f' );
m_speed.no_transform;
m_speed_value:=m_speed._value;
m_first_time :=true;
add_ctrl(@m_use_cache );
c.ConstrDbl (1 ,1 ,1 );
m_use_cache.text_color_ (@c );
c.ConstrDbl (1 ,1 ,1 );
m_use_cache.inactive_color_(@c );
c.ConstrDbl (0.8 ,0 ,0 );
m_use_cache.active_color_ (@c );
m_use_cache.no_transform;
add_ctrl(@m_run );
c.ConstrDbl (1 ,1 ,1 );
m_run.text_color_ (@c );
c.ConstrDbl (1 ,1 ,1 );
m_run.inactive_color_(@c );
c.ConstrDbl (0.8 ,0 ,0 );
m_run.active_color_ (@c );
m_run.no_transform;
m_run.status_(true );
end;
{ DESTRUCT }
destructor the_application.Destruct;
var
i : int;
begin
inherited Destruct;
m_particles.Destruct;
m_speed.Destruct;
m_use_cache.Destruct;
m_run.Destruct;
i:=0;
while i < 1000 do
begin
if g_cache[i ] <> NIL then
dispose(g_cache[i ] ,Destruct );
g_gradients[i ].Destruct;
inc(i );
end;
end;
{ RENDER_PARTICLE }
procedure render_particle(ren : renderer_base_ptr; i : unsigned; x ,y : double );
var
grm : trans_affine;
grf : gradient_circle;
ell : ellipse;
sa : span_allocator;
sg : span_gradient;
rg : renderer_scanline_aa;
inter : span_interpolator_linear;
r : double;
tas : trans_affine_scaling;
tat : trans_affine_translation;
begin
grm.Construct;
grf.Construct;
ell.Construct;
sa.Construct;
inter.Construct(@grm );
sg.Construct (@sa ,@inter ,@grf ,@g_gradients[i ] ,0 ,10 );
rg.Construct (ren ,@sg );
r:=g_radius[i ];
grm.reset;
tas.Construct(r / 10.0 );
grm.multiply (@tas );
tat.Construct(x ,y );
grm.multiply (@tat );
grm.invert;
ell.init(x ,y ,r ,r ,32 );
g_rasterizer.add_path(@ell );
render_scanlines(@g_rasterizer ,@g_scanline ,@rg );
sa.Destruct;
sg.Destruct;
end;
{ ON_INIT }
procedure the_application.on_init;
var
n ,i ,j ,d : unsigned;
component ,da : int;
divisor ,angle ,speed ,k : double;
grc : gradient_tricolor;
gr : pod_auto_array_ptr;
pixf : pixel_formats;
ren : renderer_base;
begin
n:=Trunc(m_particles._value );
srand(123 );
if m_use_cache._status then
divisor:=250.0
else
divisor:=500.0;
if m_first_time then
begin
i:=0;
while i < n do
begin
g_cx[i ]:=_width / 2 {$IFDEF DISORDER } + rand mod 10 - 5 {$ENDIF };
g_cy[i ]:=_height / 2 {$IFDEF DISORDER } + rand mod 10 - 5 {$ENDIF };
{$IFDEF DISORDER }
if rand and 1 <> 0 then
g_dx[i ]:=(rand mod 5000 + 1000 ) / divisor
else
g_dx[i ]:=-(rand mod 5000 + 1000 ) / divisor;
g_dy[i ]:=g_dx[i ];
if rand and 1 <> 0 then
g_dy[i ]:=-g_dy[i ];
//---
angle:=(rand mod 10000 ) / 10000.0 * (2.0 / 8.0 ) * pi;
da :=rand and 3;
angle:=angle + 2.0 * pi * da / 4.0 + (pi / 10.0 );
{$ELSE }
angle:=(rand mod 10000 ) / 10000.0 * 2.0 * pi;
{$ENDIF }
speed:=((rand mod 10000 ) mod 5000 + 1000.0 ) / divisor;
g_dx[i ]:=Cos(angle ) * speed;
g_dy[i ]:=Sin(angle ) * speed;
k:=1.0 - n / 2000.0;
g_radius[i ]:=(rand mod 30 + 15 ) * k;
g_color1[i ].ConstrInt(rand and $FF ,rand and $FF ,rand and $FF ,0 );
g_color2[i ].ConstrInt(rand and $FF ,rand and $FF ,rand and $FF ,255 );
component:=rand mod 3;
if component = 0 then
g_color2[i ].r:=255;
if component = 1 then
g_color2[i ].g:=255;
if component = 2 then
g_color2[i ].b:=255;
{$IFDEF DISORDER }
g_color1[i ] :=g_color2[i ];
g_color1[i ].a:=0;
{$ENDIF }
g_color3[i ].ConstrInt(rand and $FF ,rand and $FF ,rand and $FF ,0 );
grc.Construct(g_color1[i ] ,g_color2[i ] ,g_color3[i ] );
gr:=@g_gradients[i ];
j :=0;
while j < gr.size do
begin
move(
grc.array_operator(j )^ ,
gr.array_operator(j )^ ,
sizeof(aggclr ) );
inc(j );
end;
inc(i );
end;
m_first_time:=false;
end;
if m_use_cache._status then
begin
i:=0;
while i < 1000 do
begin
if g_cache[i ] <> NIL then
dispose(g_cache[i ] ,Destruct );
g_cache[i ]:=NIL;
inc(i );
end;
i:=0;
while i < n do
begin
d:=Trunc(g_radius[i ] ) * 2;
new(g_cache[i ] ,Construct(d ,d ,d * 4 ) );
pixfmt_alpha_blend_rgba(pixf ,g_cache[i ] ,bgra_order );
ren.Construct(@pixf );
render_particle(@ren ,i ,d / 2 ,d / 2 );
inc(i );
end;
end;
end;
{ ON_DRAW }
procedure the_application.on_draw;
var
i : unsigned;
width ,height ,x ,y : int;
pf ,pf_pre ,pixf : pixel_formats;
r ,r_pre : renderer_base;
rs : renderer_scanline_aa_solid;
rgba : aggclr;
n : unsigned;
tm : double;
buf : array[0..63 ] of char;
t : gsv_text;
pt : conv_stroke;
begin
width :=rbuf_window._width;
height:=rbuf_window._height;
// Initialize structures
pixfmt_bgra32(pf ,rbuf_window );
r.Construct (@pf );
rs.Construct(@r );
g_rasterizer.clip_box(0 ,0 ,width ,height );
rgba.ConstrDbl(0 ,0 ,0 );
r.clear(@rgba );
// Render
if m_run._status then
begin
start_timer;
n:=Trunc(m_particles._value );
if m_use_cache._status then
begin
pixfmt_bgra32_pre(pf_pre ,rbuf_window );
r_pre.Construct (@pf_pre );
i:=0;
while i < n do
begin
if g_cache[i ] <> NIL then
begin
pixfmt_alpha_blend_rgba(pixf ,g_cache[i ] ,bgra_order );
x:=Trunc(g_cx[i ] - g_radius[i ] ) + 1;
y:=Trunc(g_cy[i ] - g_radius[i ] ) + 1;
r_pre.blend_from(@pixf ,0 ,x ,y ,255 );
end;
inc(i );
end;
end
else
begin
i:=0;
while i < n do
begin
render_particle(@r ,i ,g_cx[i ] ,g_cy[i ] );
inc(i );
end;
end;
tm:=elapsed_time;
t.Construct;
t.size_(10.0 );
pt.Construct(@t );
pt.width_ (1.5 );
sprintf(@buf[0 ] ,'%6.1f fps' ,1000.0 / tm );
t.start_point_(10.0 ,35.0 );
t.text_ (@buf[0 ] );
g_rasterizer.add_path(@pt );
rgba.ConstrDbl(1 ,1 ,1 );
rs.color_ (@rgba );
render_scanlines(@g_rasterizer ,@g_scanline ,@rs );
t.Destruct;
pt.Destruct;
end;
// Render the controls
render_ctrl(@g_rasterizer ,@g_scanline ,@rs ,@m_particles );
render_ctrl(@g_rasterizer ,@g_scanline ,@rs ,@m_speed );
render_ctrl(@g_rasterizer ,@g_scanline ,@rs ,@m_use_cache );
render_ctrl(@g_rasterizer ,@g_scanline ,@rs ,@m_run );
end;
{ ON_MOUSE_BUTTON_DOWN }
procedure the_application.on_mouse_button_down;
begin
if (flags and mouse_left <> 0 ) or
(flags and mouse_right <> 0 ) then
force_redraw;
end;
{ ON_MOUSE_MOVE }
procedure the_application.on_mouse_move;
begin
on_mouse_button_down(x ,y ,flags );
end;
{ ON_KEY }
procedure the_application.on_key;
begin
if key = key_f1 then
message_(
'Demonstration of using the bitmap cache.'#13#13 +
'Cached bitmaps are descended from AGG renderer_base '#13 +
'and on_draw method just alpha blended to the scene.' );
end;
{ ON_IDLE }
procedure the_application.on_idle;
var
n ,i : unsigned;
x1 ,y1 ,x2 ,y2 ,dx ,dy ,cx ,cy ,max_dist ,d : double;
begin
n:=Trunc(m_particles._value );
x1:=-100;
y1:=-100;
x2:=_width + 100;
y2:=_height + 100;
dx:=Cos(g_angle ) * g_center;
dy:=Sin(g_angle ) * g_center;
cx:=dx + _width / 2;
cy:=dy + _height / 2;
max_dist:=Sqrt(_width * _width / 2 + _height * _height / 2 );
g_angle :=g_angle + 5.0 * pi / 180.0;
g_center:=g_center + g_dc;
if g_center > max_dist / 2 then
begin
g_center:=max_dist / 2;
g_dc :=-g_dc;
end;
if g_center < 10.0 then
begin
g_center:=10.0;
g_dc :=-g_dc;
end;
i:=0;
while i < n do
begin
g_cx[i ]:=g_cx[i ] + g_dx[i ] * m_speed._value;
g_cy[i ]:=g_cy[i ] + g_dy[i ] * m_speed._value;
d:=calc_distance(g_cx[i ] ,g_cy[i ] ,cx ,cy );
if d > max_dist then
begin
g_cx[i ]:=cx;
g_cy[i ]:=cy;
end;
{$IFDEF DISORDER }
{
if g_cx[i ] < x1 then
begin
g_cx[i ]:=cx;
g_cy[i ]:=cy;
end;
if g_cx[i ] > x2 then
begin
g_cx[i ]:=cx;
g_cy[i ]:=cy;
end;
if g_cy[i ] < y1 then
begin
g_cx[i ]:=cx;
g_cy[i ]:=cy;
end;
if g_cy[i ] > y2 then
begin
g_cx[i ]:=cx;
g_cy[i ]:=cy;
end;
{}
if g_cx[i ] < x1 then
begin
g_cx[i ]:=x1;
g_dx[i ]:=-g_dx[i ];
end;
if g_cx[i ] > x2 then
begin
g_cx[i ]:=x2;
g_dx[i ]:=-g_dx[i];
end;
if g_cy[i ] < y1 then
begin
g_cy[i ]:=y1;
g_dy[i ]:=-g_dy[i ];
end;
if g_cy[i ] > y2 then
begin
g_cy[i ]:=y2;
g_dy[i ]:=-g_dy[i ];
end;
{}
{$ENDIF }
inc(i );
end;
force_redraw;
end;
{ ON_CTRL_CHANGE }
procedure the_application.on_ctrl_change;
var
stop ,over : boolean;
begin
if m_run_flag <> m_run._status then
begin
wait_mode_(not m_run._status );
m_run_flag:=m_run._status;
if m_run_flag then
begin
m_first_time:=true;
on_init;
end;
end
else
begin
stop:=false;
over:=false;
if m_use_cache._status <> m_use_cache_flag then
begin
m_use_cache_flag:=m_use_cache._status;
stop:=false;
over:=true;
end;
if m_particles._value <> m_particles_value then
begin
m_particles_value:=m_particles._value;
stop:=true;
over:=false;
end;
if m_speed._value <> m_speed_value then
begin
m_speed_value:=m_speed._value;
stop:=false;
over:=false;
end;
if stop then
begin
wait_mode_ (true );
m_run.status_(false );
end
else
if over then
on_init;
end;
end;
VAR
app : the_application;
BEGIN
app.Construct(pix_format_bgra32 ,flip_y );
app.caption_ ('Renesis project -- Particles demo. (F1-Help)' );
g_scanline.Construct;
g_rasterizer.Construct;
g_path.Construct;
if app.init(600 ,500 ,window_resize ) then
begin
app.wait_mode_(false );
app.run;
end;
g_rasterizer.Destruct;
g_scanline.Destruct;
g_path.Destruct;
app.Destruct;
END.