From 10d2b755e023b58257a10e7ea176b91081eef3fc Mon Sep 17 00:00:00 2001
From: Michael Lemaire <michael@thunderk.net>
Date: Fri, 29 Jul 2016 13:57:55 +0200
Subject: [PATCH] broken wip

---
 src/interface/modeler/RenderProcess.cpp     |  8 +++++--
 src/interface/modeler/qml/main.qml          |  7 ++++++
 src/render/software/SoftwareRayRenderer.cpp |  2 ++
 src/render/software/WaterIntersector.cpp    | 22 ++++++++++++++++++
 src/render/software/WaterIntersector.h      | 25 +++++++++++++++++++++
 src/render/software/software_global.h       |  1 +
 6 files changed, 63 insertions(+), 2 deletions(-)
 create mode 100644 src/render/software/WaterIntersector.cpp
 create mode 100644 src/render/software/WaterIntersector.h

diff --git a/src/interface/modeler/RenderProcess.cpp b/src/interface/modeler/RenderProcess.cpp
index ba8d02f..ad158e1 100644
--- a/src/interface/modeler/RenderProcess.cpp
+++ b/src/interface/modeler/RenderProcess.cpp
@@ -99,8 +99,12 @@ void RenderProcess::startRender(Scenery *scenery, const RenderConfig &config) {
         delete renderer;
     }
 
-    // renderer = new SoftwareCanvasRenderer(scenery);
-    renderer = new SoftwareRayRenderer(scenery);
+    auto raytracing = window->findQmlObject("tool_render_raytracing");
+    if (raytracing->property("checked").toBool()) {
+        renderer = new SoftwareRayRenderer(scenery);
+    } else {
+        renderer = new SoftwareCanvasRenderer(scenery);
+    }
     renderer->setConfig(config);
 
     destination->setCanvas(renderer->getCanvas());
diff --git a/src/interface/modeler/qml/main.qml b/src/interface/modeler/qml/main.qml
index b998fa9..bf61953 100644
--- a/src/interface/modeler/qml/main.qml
+++ b/src/interface/modeler/qml/main.qml
@@ -112,6 +112,13 @@ OpenGLView {
             hovertext: qsTr("Show last rendered image")
             shortcut: "F6"
         }
+
+        ToolbarButton {
+            id: tool_render_raytracing
+            toggle: true
+            objectName: "tool_render_raytracing"
+            hovertext: qsTr("Use raytracing instead of rasterization")
+        }
     }
 
     BaseSecondaryToolbar {
diff --git a/src/render/software/SoftwareRayRenderer.cpp b/src/render/software/SoftwareRayRenderer.cpp
index 2f0b289..249c287 100644
--- a/src/render/software/SoftwareRayRenderer.cpp
+++ b/src/render/software/SoftwareRayRenderer.cpp
@@ -9,6 +9,7 @@
 #include "SkyIntersector.h"
 #include "TerrainIntersector.h"
 #include "Vector3.h"
+#include "WaterIntersector.h"
 
 class SoftwareRayRenderer::pimpl {
   public:
@@ -30,6 +31,7 @@ void SoftwareRayRenderer::registerStandardIntersectors() {
 
     impl->manager.registerIntersector(make_shared<SkyIntersector>(getAtmosphereRenderer()));
     impl->manager.registerIntersector(make_shared<TerrainIntersector>(getTerrainRenderer()));
+    impl->manager.registerIntersector(make_shared<WaterIntersector>(getWaterRenderer()));
 }
 
 void SoftwareRayRenderer::renderPortion(CanvasPortion *portion, RenderProgress *progress, bool *interrupt) {
diff --git a/src/render/software/WaterIntersector.cpp b/src/render/software/WaterIntersector.cpp
new file mode 100644
index 0000000..3d7002b
--- /dev/null
+++ b/src/render/software/WaterIntersector.cpp
@@ -0,0 +1,22 @@
+#include "WaterIntersector.h"
+
+#include "InfinitePlane.h"
+#include "InfiniteRay.h"
+#include "WaterRenderer.h"
+
+WaterIntersector::WaterIntersector(WaterRenderer *renderer): renderer(renderer) {
+}
+
+int WaterIntersector::getPriority() const {
+    return 10;
+}
+
+bool WaterIntersector::findIntersection(const Vector3 &eye, const Vector3 &direction, double, Vector3 *out_hit) const {
+    InfinitePlane water(Vector3(0.0, renderer->getHeightInfo().base_height, 0.0), VECTOR_UP);
+    int intersect = water.checkRayIntersection(InfiniteRay(eye, direction), out_hit);
+    return intersect == 1 && direction.dotProduct(out_hit->sub(eye)) > 0.0;
+}
+
+Color WaterIntersector::getColorAtHit(const Vector3 &, const Vector3 &location) const {
+    return renderer->getResult(location.x, location.z).final;
+}
diff --git a/src/render/software/WaterIntersector.h b/src/render/software/WaterIntersector.h
new file mode 100644
index 0000000..d4b05bf
--- /dev/null
+++ b/src/render/software/WaterIntersector.h
@@ -0,0 +1,25 @@
+#pragma once
+
+#include "software_global.h"
+
+#include "RayIntersector.h"
+
+namespace paysages {
+namespace software {
+
+/**
+ * Ray intersector with water.
+ */
+class SOFTWARESHARED_EXPORT WaterIntersector : public RayIntersector {
+  public:
+    WaterIntersector(WaterRenderer *renderer);
+    virtual int getPriority() const override;
+    virtual bool findIntersection(const Vector3 &eye, const Vector3 &direction, double limit,
+                                  Vector3 *out_hit) const override;
+    virtual Color getColorAtHit(const Vector3 &eye, const Vector3 &location) const override;
+
+  private:
+    WaterRenderer *renderer;
+};
+}
+}
diff --git a/src/render/software/software_global.h b/src/render/software/software_global.h
index dc8dfad..783f449 100644
--- a/src/render/software/software_global.h
+++ b/src/render/software/software_global.h
@@ -49,6 +49,7 @@ class RayCastingManager;
 class RayCastingResult;
 class RayIntersector;
 class SkyIntersector;
+class WaterIntersector;
 
 class NightSky;
 class MoonRenderer;