Reflecting Water
From GameStudio Wiki
You can find a downloadlink for a sample project with instructions on how to use it in this Forumpost.
Here you go in case it is somewhen not accesible anymore, or you don`t want to download it:
This effect needs render to texture, if your 3DGS edition does not support it, you can use the plugin created by ChrisB (just copy it into your proectfolder). This doesn`t always seem to work right, if you don`t want realtimereflections or the water is just black, you can find a solution further down.
How to integrate it into your own project: Place the water.fx file, the Shader.wdl and the waves.jpg file in your Projectfolder, add this line to your main wdl:
include <Shader.wdl>;
and assign the action water to a flat model or terrain entity.
Copy the follwing code into a new file in SED and save it as Shader.wdl:
//use Render2Texture Dll by ChrisB
plugindir "."; //Comment this part
dllfunction r2T_eventSky(); //out if your
dllfunction r2T_eventEntities(); //3DGS edition
render_sky = r2T_eventSky; //supports
render_entities = r2T_eventEntities; //render to texture.
//
bmap waterbump = <waves.jpg>;
//bmap envspec = <sky.tga>;
function mtl_ffpwater_event();
material mtl_ffpwater
{
skin1=waterbump;
// skin2=envspec;
event = mtl_ffpwater_event;
effect = "water.fx";
}
function mtl_ffpwater_event()
{
while(1)
{
//Lets make it scroll in some direction
mtl_ffpwater.skill1 += 0.1*time_step; //Move the water along the x axis with the given speed
mtl_ffpwater.skill2 += 0.1*time_step; //Move the water along the y axis with the given speed
mtl_ffpwater.matrix31 = floatd(sin(mtl_ffpwater.skill1)*100000,40000);
mtl_ffpwater.matrix32 = floatd(cos(mtl_ffpwater.skill2)*100000,40000);
wait(1);
}
}
VIEW view_mirror { layer = -1; }; // render mirror view before camera view
BMAP* bmap_mirrortarget;
//panel rtt{flags = visible;}
function fx_mirror()
{
// do nothing if mirror is already running
if (bmap_mirrortarget) { return; }
bmap_mirrortarget = bmap_createblack(512,512,888);
mtl_ffpwater.skin2 = bmap_mirrortarget;
view_mirror.bmap = bmap_mirrortarget;
view_mirror.size_x = bmap_width(bmap_mirrortarget);
view_mirror.size_y = bmap_height(bmap_mirrortarget);
// rtt.bmap = bmap_mirrortarget;
// vec_set(view_mirror.portal_x,my.x);
// vec_add(view_mirror.portal_x,vector(0,0,0));
// vec_set(view_mirror.pnormal_x,vector(0,0,1.0)); // reflect upwards
// view_mirror.portalclip = on; // clip at portal plane
view_mirror.noshadow = on; // suppress shadows in the mirror
// view_mirror.nocull = on; // view through walls
view_mirror.noparticle = on;
// view_mirror.noshader = on;
view_mirror.visible = on;
while (bmap_mirrortarget)
{
proc_late(); // camera must be moved and mtlfx_mirrorvisible set before
// view_mirror.aspect = 1;//1024/768; // screen aspect, independent of render target
view_mirror.arc = camera.arc;
view_mirror.fog_start = camera.fog_start;
view_mirror.fog_end = camera.fog_end;
view_mirror.clip_far = camera.clip_far;
view_mirror.clip_near = camera.clip_near;
view_mirror.x = camera.x;
view_mirror.y = camera.y;
view_mirror.z = 2*my.z-camera.z;//view_mirror.portal_z-camera.z; // move the camera at its mirror position
view_mirror.pan = camera.pan;
view_mirror.tilt = -camera.tilt; // flip the vertical camera angle
view_mirror.roll = -camera.roll;
wait(1);
}
}
action Water
{
mtl_ffpwater.matrix11 = float(100); //Tilefactor of the Bumpmap in x direction
mtl_ffpwater.matrix22 = float(100); //Tilefactor of the Bumpmap in y direction
bmap_to_mipmap(mtl_ffpwater.skin1);
// bmap_to_mipmap(mtl_ffpwater.skin2);
my.material = mtl_ffpwater;
fx_mirror();
}
Create an other file with the following code and save it as water.fx:
////////////////////////////////////////////////////////
// Environment Mapping Bump Mapping Water
//
// Version 2
//
// Eric Hendrickson-Lambert (Steempipe)
//
////////////////////////////////////////////////////////
matrix matMtl;
texture mtlSkin1;
texture mtlSkin2;
technique makewater2
{
pass p0
{
AlphaBlendEnable=false;
Zenable = True;
ZwriteEnable = True;
BlendOp=Add;
Lighting=True;
Texture[0] = <mtlSkin1>;
Texture[1] = <mtlSkin2>;
magFilter[0] = linear;
minFilter[0] = linear;
mipFilter[0] = linear;
COLOROP[0] = BumpEnvMap;
COLORARG1[0] = Texture;
COLORARG2[0] = Current;
TexCoordIndex[0] = 1;
TextureTransformFlags[0] = Count2;
TextureTransform[0] = <matMtl>;
magFilter[1] = Linear;
minFilter[1] = Linear;
mipFilter[1] = Linear;
AddressU[1] = Clamp;
AddressV[1] = Clamp;
ColorOp[1] = Modulate; //Modulate/AddSigned/Modulate2x/Modulate4x/Add <----------This looks all okay
ColorArg1[1] = Texture;
ColorArg2[1] = Current;
texcoordindex[1] = cameraspaceposition | 1; // For cubemap use: cameraspacereflectionvector
TextureTransformFlags[1] = count3 | projected;
TextureTransform[1] = {
0.8, 0.0, 0.0, 0.0,//u-scale of lake rgb texture CHANGE THIS TO YOUR NEEDS!
0.0, 1.0, 0.0, 0.0,//v-scale of lake rgb texture CHANGE THIS TO YOUR NEEDS!
0.0, 0.0, 1.0, 0.0,
0.0, 0.0, 0.0, 1.0
};
}
}
//technique fallback { pass p0 { } }
Waves.jpg:
- If you don`t want the realtimereflections or the water is just black use the following changes
Use this changed Shader.wdl. There won´t be any reflection now, but the effect it self should work fine:
bmap waterbump = <waves.jpg>;
bmap envspec = <sky.tga>;
function mtl_ffpwater_event();
material mtl_ffpwater
{
skin1=waterbump;
skin2=envspec;
event = mtl_ffpwater_event;
effect = "water.fx";
}
function mtl_ffpwater_event()
{
while(1)
{
//Lets make it scroll in some direction
mtl_ffpwater.skill1 += 0.1*time_step; //Move the water along the x axis with the given speed
mtl_ffpwater.skill2 += 0.1*time_step; //Move the water along the y axis with the given speed
mtl_ffpwater.matrix31 = floatd(sin(mtl_ffpwater.skill1)*100000,40000);
mtl_ffpwater.matrix32 = floatd(cos(mtl_ffpwater.skill2)*100000,40000);
wait(1);
}
}
action Water
{
mtl_ffpwater.matrix11 = float(100); //Tilefactor of the Bumpmap in x direction
mtl_ffpwater.matrix22 = float(100); //Tilefactor of the Bumpmap in y direction
bmap_to_mipmap(mtl_ffpwater.skin1);
bmap_to_mipmap(mtl_ffpwater.skin2);
my.material = mtl_ffpwater;
}
You also need this sky.jpg:
--Slin 04:02, 29 October 2007 (CET)
