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@@ -0,0 +1,194 @@
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+package hrt.prefab.rfx;
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+
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+class GenFogShader extends h3d.shader.ScreenShader {
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+
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+ static var SRC = {
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+
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+ @param var startDistance : Float;
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+ @param var distanceScale : Float;
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+ @param var distanceOpacity : Float;
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+ @param var cameraDistance : Float;
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+
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+ @param var startHeight : Float;
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+ @param var heightScale : Float;
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+ @param var heightOpacity : Float;
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+
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+ @param var startColor : Vec4;
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+ @param var endColor : Vec4;
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+
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+ @const var usePosition : Bool;
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+ @param var position : Vec3;
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+
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+ @ignore @param var depthTexture : Channel;
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+ @ignore @param var cameraPos : Vec3;
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+ @ignore @param var cameraInverseViewProj : Mat4;
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+
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+ function getPosition( uv: Vec2 ) : Vec3 {
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+ var depth = depthTexture.get(uv);
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+ var uv2 = uvToScreen(calculatedUV);
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+ var isSky = 1 - ceil(depth);
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+ depth = mix(depth, 1, isSky);
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+ var temp = vec4(uv2, depth, 1) * cameraInverseViewProj;
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+ var originWS = temp.xyz / temp.w;
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+ return originWS;
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+ }
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+
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+ function fragment() {
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+ var calculatedUV = input.uv;
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+ var origin = getPosition(calculatedUV);
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+ var amount = 0.;
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+
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+ if( distanceScale != 0 ) {
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+ var distance = (origin - (usePosition ? position : cameraPos)).length() - cameraDistance;
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+ amount += clamp((distance - startDistance) * distanceScale, 0, 1) * distanceOpacity;
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+ }
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+
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+ if( heightScale != 0 ) {
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+ var height = origin.z;
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+ if( usePosition ) height -= position.z;
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+ amount += clamp((height - startHeight) * heightScale, 0, 1) * heightOpacity;
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+ }
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+
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+ var fogColor = mix(startColor, endColor, amount);
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+ pixelColor = fogColor;
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+ }
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+
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+ };
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+
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+ public function new() {
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+ super();
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+ }
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+
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+}
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+
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+typedef GenFogProps = {
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+ var startDistance : Float;
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+ var endDistance : Float;
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+ var distanceOpacity : Float;
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+ var distanceFixed : Bool;
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+
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+ var startHeight : Float;
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+ var endHeight : Float;
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+ var heightOpacity : Float;
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+
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+ var startOpacity : Float;
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+ var endOpacity : Float;
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+
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+ var startColor : Int;
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+ var endColor : Int;
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+ var renderMode : String;
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+
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+ var posX : Float;
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+ var posY : Float;
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+ var posZ : Float;
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+ var usePosition : Bool;
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+}
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+
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+class GenFog extends RendererFX {
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+
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+ var fogPass = new h3d.pass.ScreenFx(new GenFogShader());
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+
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+ public function new(?parent) {
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+ super(parent);
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+ props = ({
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+ startDistance : 0,
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+ endDistance : 100,
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+ distanceOpacity : 0,
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+ distanceFixed : false,
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+
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+ startHeight : 100,
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+ endHeight : 0,
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+ heightOpacity : 0,
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+
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+ posX : 0,
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+ posY : 0,
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+ posZ : 0,
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+ usePosition : false,
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+
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+ startOpacity : 0,
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+ endOpacity : 1,
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+ startColor : 0xffffff,
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+ endColor : 0xffffff,
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+ renderMode : "AfterTonemapping",
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+ } : GenFogProps);
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+
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+ fogPass.pass.setBlendMode(Alpha);
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+ }
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+
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+ override function apply(r:h3d.scene.Renderer, step:h3d.impl.RendererFX.Step) {
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+ var p : GenFogProps = props;
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+ if( (step == AfterTonemapping && p.renderMode == "AfterTonemapping") || (step == BeforeTonemapping && p.renderMode == "BeforeTonemapping") ) {
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+ r.mark("DistanceFog");
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+ var ctx = r.ctx;
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+ var depth : hxsl.ChannelTexture = ctx.getGlobal("depthMap");
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+
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+ fogPass.shader.startDistance = p.startDistance;
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+ fogPass.shader.distanceScale = 1 / (p.endDistance - p.startDistance);
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+ fogPass.shader.distanceOpacity = p.distanceOpacity;
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+ fogPass.shader.cameraDistance = p.distanceFixed ? r.ctx.camera.pos.sub(r.ctx.camera.target).length() : 0;
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+
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+ fogPass.shader.startHeight = p.startHeight;
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+ fogPass.shader.heightScale = 1 / (p.endHeight - p.startHeight);
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+ fogPass.shader.heightOpacity = p.heightOpacity;
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+
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+ fogPass.shader.startColor.setColor(p.startColor);
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+ fogPass.shader.endColor.setColor(p.endColor);
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+ fogPass.shader.startColor.a = p.startOpacity;
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+ fogPass.shader.endColor.a = p.endOpacity;
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+
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+ fogPass.shader.position.set(p.posX, p.posY, p.posZ);
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+ fogPass.shader.usePosition = p.usePosition;
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+
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+ fogPass.shader.depthTextureChannel = depth.channel;
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+ fogPass.shader.depthTexture = depth.texture;
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+
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+ fogPass.shader.cameraPos = ctx.camera.pos;
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+ fogPass.shader.cameraInverseViewProj.load(ctx.camera.getInverseViewProj());
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+
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+ fogPass.render();
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+ }
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+ }
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+
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+ #if editor
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+ override function edit( ctx : hide.prefab.EditContext ) {
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+ ctx.properties.add(new hide.Element('
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+ <dl>
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+ <div class="group" name="Distance">
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+ <dt>Start Distance</dt><dd><input type="range" min="0" max="100" field="startDistance"/></dd>
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+ <dt>End Distance</dt><dd><input type="range" min="0" max="100" field="endDistance"/></dd>
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+ <dt>Distance Opacity</dt><dd><input type="range" min="0" max="2" field="distanceOpacity"/></dd>
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+ <dt>Camera Independant</dt><dd><input type="checkbox" field="distanceFixed"/></dd>
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+ </div>
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+ <div class="group" name="Height">
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+ <dt>Start Height</dt><dd><input type="range" min="0" max="100" field="startHeight"/></dd>
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+ <dt>End Height</dt><dd><input type="range" min="0" max="100" field="endHeight"/></dd>
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+ <dt>Height Opacity</dt><dd><input type="range" min="0" max="2" field="heightOpacity"/></dd>
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+ </div>
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+ <div class="group" name="Center">
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+ <dt>X</dt><dd><input type="range" min="-100" max="100" field="posX"/></dd>
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+ <dt>Y</dt><dd><input type="range" min="-100" max="100" field="posY"/></dd>
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+ <dt>Z</dt><dd><input type="range" min="-100" max="100" field="posZ"/></dd>
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+ <dt>Use Center Point</dt><dd><input type="checkbox" field="usePosition"/></dd>
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+ </div>
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+ <div class="group" name="Color">
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+ <dt>Start Color</dt><dd><input type="color" field="startColor"/></dd>
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+ <dt>End Color</dt><dd><input type="color" field="endColor"/></dd>
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+ <dt>Start Opacity</dt><dd><input type="range" min="0" max="1" field="startOpacity"/></dd>
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+ <dt>End Opacity</dt><dd><input type="range" min="0" max="1" field="endOpacity"/></dd>
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+ </div>
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+ <div class="group" name="Rendering">
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+ <dt>Render Mode</dt>
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+ <dd><select field="renderMode">
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+ <option value="BeforeTonemapping">Before Tonemapping</option>
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+ <option value="AfterTonemapping">After Tonemapping</option>
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+ </select></dd>
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+ </div>
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+
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+ </dl>
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+ '),props);
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+ }
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+ #end
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+
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+ static var _ = Library.register("rfx.genFog", GenFog);
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+
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+}
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Nicolas Cannasse