From 9e05403abaee0497a85231db753e1af0849fb7e8 Mon Sep 17 00:00:00 2001
From: Zach Pomerantz <zmp@umich.edu>
Date: Thu, 15 Dec 2016 14:59:25 -0500
Subject: [PATCH] forward render opaque bounds

---
 .../render-utils/src/RenderForwardTask.cpp    | 76 ++++++++++++++-----
 .../render-utils/src/RenderForwardTask.h      | 16 +++-
 2 files changed, 73 insertions(+), 19 deletions(-)

diff --git a/libraries/render-utils/src/RenderForwardTask.cpp b/libraries/render-utils/src/RenderForwardTask.cpp
index 9cd37a1ad6..0d032f1965 100755
--- a/libraries/render-utils/src/RenderForwardTask.cpp
+++ b/libraries/render-utils/src/RenderForwardTask.cpp
@@ -21,29 +21,14 @@
 
 #include <render/CullTask.h>
 #include <render/SortTask.h>
-#include <render/DrawTask.h>
-#include <render/DrawStatus.h>
-#include <render/DrawSceneOctree.h>
-#include <render/BlurTask.h>
 
-#include "LightingModel.h"
-#include "DebugDeferredBuffer.h"
-#include "DeferredFramebuffer.h"
-#include "DeferredLightingEffect.h"
-#include "SurfaceGeometryPass.h"
 #include "FramebufferCache.h"
-#include "HitEffect.h"
 #include "TextureCache.h"
 
-#include "AmbientOcclusionEffect.h"
-#include "AntialiasingEffect.h"
-#include "ToneMappingEffect.h"
-#include "SubsurfaceScattering.h"
-
 #include <gpu/StandardShaderLib.h>
 
-#include "drawOpaqueStencil_frag.h"
-
+#include <render/drawItemBounds_vert.h>
+#include <render/drawItemBounds_frag.h>
 
 using namespace render;
 extern void initOverlay3DPipelines(render::ShapePlumber& plumber);
@@ -95,6 +80,8 @@ RenderForwardTask::RenderForwardTask(CullFunctor cullFunctor) {
 
     const auto framebuffer = addJob<PrepareFramebuffer>("PrepareFramebuffer");
 
+    addJob<DrawBounds>("DrawBounds", opaques);
+
     // Blit!
     addJob<Blit>("Blit", framebuffer);
 }
@@ -153,8 +140,61 @@ void PrepareFramebuffer::run(const SceneContextPointer& sceneContext, const Rend
             gpu::Framebuffer::BUFFER_COLOR0 |
             gpu::Framebuffer::BUFFER_DEPTH |
             gpu::Framebuffer::BUFFER_STENCIL,
-            vec4(vec3(0), 0), 1.0, 0.0, true);
+            vec4(vec3(0), 1), 1.0, 0.0, true);
     });
 
     framebuffer = _framebuffer;
 }
+
+const gpu::PipelinePointer DrawBounds::getPipeline() {
+    if (!_boundsPipeline) {
+        auto vs = gpu::Shader::createVertex(std::string(drawItemBounds_vert));
+        auto ps = gpu::Shader::createPixel(std::string(drawItemBounds_frag));
+        gpu::ShaderPointer program = gpu::Shader::createProgram(vs, ps);
+
+        gpu::Shader::BindingSet slotBindings;
+        gpu::Shader::makeProgram(*program, slotBindings);
+
+        _cornerLocation = program->getUniforms().findLocation("inBoundPos");
+        _scaleLocation = program->getUniforms().findLocation("inBoundDim");
+
+        auto state = std::make_shared<gpu::State>();
+        state->setDepthTest(true, false, gpu::LESS_EQUAL);
+        state->setBlendFunction(true,
+            gpu::State::SRC_ALPHA, gpu::State::BLEND_OP_ADD, gpu::State::INV_SRC_ALPHA,
+            gpu::State::DEST_ALPHA, gpu::State::BLEND_OP_ADD, gpu::State::ZERO);
+
+        _boundsPipeline = gpu::Pipeline::create(program, state);
+    }
+    return _boundsPipeline;
+}
+
+void DrawBounds::run(const SceneContextPointer& sceneContext, const RenderContextPointer& renderContext, const Inputs& items) {
+    RenderArgs* args = renderContext->args;
+    auto& scene = sceneContext->_scene;
+
+    gpu::doInBatch(args->_context, [&](gpu::Batch& batch) {
+        // Setup projection
+        glm::mat4 projMat;
+        Transform viewMat;
+        args->getViewFrustum().evalProjectionMatrix(projMat);
+        args->getViewFrustum().evalViewTransform(viewMat);
+        batch.setProjectionTransform(projMat);
+        batch.setViewTransform(viewMat);
+        batch.setModelTransform(Transform());
+
+        // Bind program
+        batch.setPipeline(getPipeline());
+        assert(_cornerLocation >= 0);
+        assert(_scaleLocation >= 0);
+
+        // Render bounds
+        for (const auto& item : items) {
+            batch._glUniform3fv(_cornerLocation, 1, (const float*)(&item.bound.getCorner()));
+            batch._glUniform3fv(_scaleLocation, 1, (const float*)(&item.bound.getScale()));
+
+            static const int NUM_VERTICES_PER_CUBE = 24;
+            batch.draw(gpu::LINES, NUM_VERTICES_PER_CUBE, 0);
+        }
+    });
+}
diff --git a/libraries/render-utils/src/RenderForwardTask.h b/libraries/render-utils/src/RenderForwardTask.h
index 9c4634a8ee..a4839e18ec 100755
--- a/libraries/render-utils/src/RenderForwardTask.h
+++ b/libraries/render-utils/src/RenderForwardTask.h
@@ -39,4 +39,18 @@ private:
     gpu::FramebufferPointer _framebuffer;
 };
 
-#endif // hifi_RenderForwardTask_h
+class DrawBounds {
+public:
+    using Inputs = render::ItemBounds;
+    using JobModel = render::Job::ModelI<DrawBounds, Inputs>;
+
+    void run(const render::SceneContextPointer& sceneContext, const render::RenderContextPointer& renderContext, const Inputs& items);
+
+private:
+    const gpu::PipelinePointer getPipeline();
+    gpu::PipelinePointer _boundsPipeline;
+    int _cornerLocation { -1 };
+    int _scaleLocation { -1 };
+};
+
+#endif // hifi_RenderForwardTask_h
\ No newline at end of file