Fixed AABB Sizing issue.
Fixed is a strong word. TODO: I have solved the problem by using isEmpty to tell when it's a fresh AABB and just returing the passed AABB as the new expanded AABB. This feels lazy and I expect it'll cause issues in the future. Plus it isn't truely correct and the context which uses it could just use the first obj AABB since there is only 1 objectmain
Brett
parent
a28d49b132
commit
17c7942405
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@ -1,3 +1,3 @@
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Start testing: Nov 14 20:44 EST
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Start testing: Nov 15 00:51 EST
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----------------------------------------------------------
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End testing: Nov 14 20:44 EST
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End testing: Nov 15 00:51 EST
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@ -9,7 +9,7 @@ Size=550,680
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Collapsed=1
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[Window][Debug Menu]
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Pos=13,12
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Pos=-6,23
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Size=339,226
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Collapsed=0
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@ -74,8 +74,8 @@ Size=324,211
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Collapsed=0
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[Window][BVH Data ]
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Pos=930,180
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Size=397,473
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Pos=913,184
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Size=522,476
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Collapsed=0
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[Window][Example: Long text display]
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@ -83,7 +83,17 @@ Pos=60,60
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Size=520,600
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Collapsed=0
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[Window][Example: Log]
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Pos=60,60
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Size=500,400
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Collapsed=0
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[Table][0xD0F0C6E3,2]
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Column 0 Weight=1.0000
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Column 1 Weight=1.0000
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[Table][0xC9935533,3]
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Column 0 Weight=1.0000
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Column 1 Weight=1.0000
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Column 2 Weight=1.0000
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@ -9,9 +9,12 @@
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#include "engine/util/std.h"
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#include "engine/types.h"
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#include <config.h>
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#ifdef COMPILE_GUI
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#include <graphics/gl/gl.h>
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#include <graphics/imgui/imgui.h>
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#endif
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#include <utility>
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@ -64,10 +67,16 @@ namespace Raytracing {
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worldShader.setVec3("color", {1.0, 1.0, 1.0});
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if (selected == index) {
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worldShader.setVec3("color", {0.0, 0.0, 1.0});
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if (ImGui::BeginListBox("")){
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if (ImGui::BeginListBox("", ImVec2(250, 350))) {
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std::stringstream strs;
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strs << aabb;
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ImGui::Text("%s", strs.str().c_str());
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for (const auto& item: objs) {
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auto pos = item.ptr->getPosition();
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ImGui::Text("%s", (std::to_string(pos.x()) + " " + std::to_string(pos.y()) + " " + std::to_string(pos.z())).c_str());
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std::stringstream stm;
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stm << item.aabb;
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ImGui::Text("%s,\n\t%s", (std::to_string(pos.x()) + " " + std::to_string(pos.y()) + " " + std::to_string(pos.z())).c_str(),
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stm.str().c_str());
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}
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ImGui::EndListBox();
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}
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@ -92,7 +101,18 @@ namespace Raytracing {
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}
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}
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void gui() const {
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if (ImGui::Selectable(("S: " + std::to_string(objs.size()) + " I: " + std::to_string(index)).c_str(), selected == index))
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int c1 = -1;
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int c2 = -1;
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if (left != nullptr)
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c1 = left->index;
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if (right != nullptr)
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c2 = right->index;
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std::string t;
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if (c1 == -1 && c2 == -1)
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t = " LEAF";
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else
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t = " L: " + std::to_string(c1) + " R: " + std::to_string(c2);
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if (ImGui::Selectable(("S: " + std::to_string(objs.size()) + " I: " + std::to_string(index) + t).c_str(), selected == index))
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selected = index;
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}
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#endif
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@ -111,40 +131,32 @@ namespace Raytracing {
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static BVHPartitionedSpace partition(const std::pair<AABB, AABB>& aabbs, const std::vector<BVHObject>& objs) {
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BVHPartitionedSpace space;
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for (const auto& obj: objs) {
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// if this object doesn't have an AABB, we cannot use a BVH on it
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// If this ever fails we have a problem with the implementation.
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// if this object doesn't have an AABB, we cannot use a BVH on it. If this ever fails we have a problem with the implementation.
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RTAssert(!obj.aabb.isEmpty());
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if (aabbs.first.intersects(obj.aabb)) {
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if (aabbs.first.intersects(obj.aabb))
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space.left.push_back(obj);
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tlog << "left\n";
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}
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if (aabbs.second.intersects(obj.aabb)) {
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else if (aabbs.second.intersects(obj.aabb))
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space.right.push_back(obj);
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tlog << "right\n";
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}
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}
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return space;
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}
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BVHNode* addObjectsRecur(const std::vector<BVHObject>& objects, long prevSize) {
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ilog << "size: " << objects.size() << " " << prevSize << "\n";
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// prevSize was required to solve some really weird bugs
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// which are a TODO:
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if ((objects.size() <= 1 && !objects.empty()) || prevSize == objects.size()) {
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AABB local;
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for (const auto& obj: objects)
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local = local.expand(obj.aabb);
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return new BVHNode(objects, local, nullptr, nullptr);
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} else if (objects.empty()) // should never reach here!!
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return nullptr;
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// create a volume for the entire world.
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// yes, we could use the recursion provided AABB,
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// but that wouldn't be minimum, only half.
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// this ensures that we have a minimum AABB.
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AABB world;
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for (const auto& obj: objects) {
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for (const auto& obj: objects)
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world = world.expand(obj.aabb);
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}
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// prevSize was required to solve some really weird bugs
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// which are a TODO:
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if ((objects.size() <= 1 && !objects.empty()) || prevSize == objects.size()) {
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return new BVHNode(objects, world, nullptr, nullptr);
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} else if (objects.empty()) // should never reach here!!
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return nullptr;
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// then split and partition the world
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auto splitAABBs = world.splitByLongestAxis();
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auto partitionedObjs = partition(splitAABBs, objects);
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@ -172,7 +184,7 @@ namespace Raytracing {
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// divide and conquer and so on
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if (node->right != nullptr)
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if (node->right->aabb.intersects(ray, min, max))
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return traverseFindRayIntersection(node->left, ray, min, max);
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return traverseFindRayIntersection(node->right, ray, min, max);
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// return the objects of the lowest BVH node we can find
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// if this is implemented properly this should only contain one, maybe two objects
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// which is much faster! (especially when dealing with triangles)
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@ -211,8 +223,7 @@ namespace Raytracing {
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// move all the object's aabb's into world position
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std::vector<BVHObject> objs;
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for (auto* obj: objects) {
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// we don't want to store all the AABBs which don't exist
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// ie spheres
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// we don't want to store all the AABBs which don't exist: ie spheres
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if (obj->getAABB().isEmpty()) {
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noAABBObjects.push_back(obj);
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continue;
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@ -240,14 +251,17 @@ namespace Raytracing {
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worldShader.setInt("useWhite", 1);
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worldShader.setVec3("color", {1.0, 1.0, 1.0});
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{
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ImGui::BeginChild("left pane", ImVec2(150, 0), true);
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ImGui::BeginChild("left pane", ImVec2(180, 0), true);
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guiNodesRecur(root);
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ImGui::EndChild();
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}
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ImGui::SameLine();
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{
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ImGui::BeginGroup();
|
||||
ImGui::BeginChild("item view", ImVec2(0, -ImGui::GetFrameHeightWithSpacing()), true, ImGuiWindowFlags_AlwaysAutoResize); // Leave room for 1 line below us
|
||||
ImGui::BeginChild("item view",
|
||||
ImVec2(0, -ImGui::GetFrameHeightWithSpacing()),
|
||||
true,
|
||||
ImGuiWindowFlags_AlwaysAutoResize); // Leave room for 1 line below us
|
||||
drawNodesRecur(worldShader, root);
|
||||
ImGui::EndChild();
|
||||
ImGui::EndGroup();
|
||||
|
|
|
|||
|
|
@ -41,6 +41,11 @@ namespace Raytracing {
|
|||
|
||||
// returns an expanded version of this AABB is the other AABB is larger then this AABB
|
||||
[[nodiscard]] AABB expand(const AABB& other) const {
|
||||
// terrible hack
|
||||
// a 0 init AABB was having issues when being "expanded" to a place which is larger
|
||||
// this should prevent that by side stepping the issue. Which is a TODO:
|
||||
if (isEmpty())
|
||||
return other;
|
||||
PRECISION_TYPE minX = std::min(min.x(), other.min.x());
|
||||
PRECISION_TYPE minY = std::min(min.y(), other.min.y());
|
||||
PRECISION_TYPE minZ = std::min(min.z(), other.min.z());
|
||||
|
|
|
|||
|
|
@ -43,6 +43,7 @@
|
|||
// mul
|
||||
// 70.9977ms normal
|
||||
// 286.656ms avx
|
||||
|
||||
#ifdef COMPILER_DEBUG_ENABLED
|
||||
#define USE_SIMD_CPU
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -87,19 +87,29 @@ namespace Raytracing {
|
|||
tmin = std::min(tmin, std::min(tx1, tx2));
|
||||
tmax = std::max(tmax, std::max(tx1, tx2));
|
||||
|
||||
// gives us an early exit if we know it's outside the bounds.
|
||||
if (tmax <= tmin)
|
||||
return false;
|
||||
|
||||
PRECISION_TYPE ty1 = (min.y() - ray.getStartingPoint().y())*ray.getInverseDirection().y();
|
||||
PRECISION_TYPE ty2 = (max.y() - ray.getStartingPoint().y())*ray.getInverseDirection().y();
|
||||
|
||||
tmin = std::max(tmin, std::min(ty1, ty2));
|
||||
tmax = std::min(tmax, std::max(ty1, ty2));
|
||||
|
||||
if (tmax <= tmin)
|
||||
return false;
|
||||
|
||||
PRECISION_TYPE tz1 = (min.z() - ray.getStartingPoint().z())*ray.getInverseDirection().z();
|
||||
PRECISION_TYPE tz2 = (max.z() - ray.getStartingPoint().z())*ray.getInverseDirection().z();
|
||||
|
||||
tmin = std::max(tmin, std::min(tz1, tz2));
|
||||
tmax = std::min(tmax, std::max(tz1, tz2));
|
||||
|
||||
return tmax > std::max(tmin, 0.0);
|
||||
if (tmax <= tmin)
|
||||
return false;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
bool AABB::intersects(const Ray& ray, PRECISION_TYPE tmin, PRECISION_TYPE tmax) {
|
||||
|
|
|
|||
Loading…
Reference in New Issue