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Physics Debug Draw

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This commit is contained in:
Isuru Samarathunga
2025-09-29 14:53:06 +05:30
parent b18bfe873f
commit 9269306146
7 changed files with 54 additions and 86 deletions
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1
Src/IAESandbox/imp/cpp/Game.cpp
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@ -35,6 +35,7 @@ namespace ia::iae::game
t->BakeAnimations();
}
g_playerPhysics = g_player->AddComponent<PhysicsComponent>();
g_playerPhysics->IsDynamic() = true;
g_playerPhysics->AddCollider({
.IsTrigger = false,
.Position = {

1
Src/IAEngine/imp/cpp/Components/Physics.cpp
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@ -56,6 +56,7 @@ namespace ia::iae
VOID PhysicsComponent::Move(IN glm::vec2 direction)
{
IA_ASSERT(m_isDynamic);
const auto v = direction * m_movementSpeed;
for(const auto& t: m_colliders)
{

5
Src/IAEngine/imp/cpp/IAEngine.cpp
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@ -36,6 +36,8 @@ namespace ia::iae
{
CONSTEXPR FLOAT32 GAME_UPDATE_INTERVAL = 1000.0f / 60.0f;
EXTERN BOOL g_physicsDebugDrawEnabled;
SDL_Event g_event{};
FLOAT32 g_updateTimer{};
BOOL g_shouldClose{false};
@ -132,6 +134,9 @@ namespace ia::iae
VOID Engine::UpdateGame()
{
if(Input::WasKeyPressed(Input::KEY_F6))
g_physicsDebugDrawEnabled = !g_physicsDebugDrawEnabled;
Physics::Update();
if B_LIKELY (g_activeScene)

29
Src/IAEngine/imp/cpp/Physics/Physics.cpp
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@ -16,6 +16,7 @@
#include <IAEngine/IAEngine.hpp>
#include <IAEngine/Physics/Physics.hpp>
#include <IAEngine/Rendering/DebugDraw.hpp>
#include <IAEngine/Nodes/Node.hpp>
@ -23,6 +24,8 @@
namespace ia::iae
{
BOOL g_physicsDebugDrawEnabled = false;
Vector<PhysicsComponent *> g_physicsComponents;
FLOAT32 Sq(IN FLOAT32 v)
@ -45,7 +48,7 @@ namespace ia::iae
const auto dY = abs(d.y);
if (d.x >= 0)
{
if (dX >= dY)
if (dX > dY)
{
return RectSide::RIGHT;
}
@ -56,7 +59,7 @@ namespace ia::iae
}
else
{
if (dX >= dY)
if (dX > dY)
{
return RectSide::LEFT;
}
@ -80,6 +83,23 @@ namespace ia::iae
{
}
VOID Physics::DebugDraw()
{
if(!g_physicsDebugDrawEnabled)
return;
for(const auto& t: g_physicsComponents)
{
for(const auto& c: t->Colliders())
{
auto color = glm::vec4{0.75f, 0.0f, 0.0f, 1.0f};
if(c.IsTrigger)
color = {0.25f, 0.45f, 0.75f, 0.75f};
DebugDraw::DrawRect(t->GetNode()->GetPosition() + c.Position, c.Size, color, 2.0f);
}
}
}
Handle Physics::RegisterComponent(IN PhysicsComponent *component)
{
g_physicsComponents.pushBack(component);
@ -101,17 +121,16 @@ namespace ia::iae
const auto tMiddle = t->GetNode()->GetPosition() + tc.Position + tc.Size / 2.0f;
const auto tHalfSize = tc.Size / 2.0f;
const auto rectSide = GetRectSide(tMiddle - middle);
const auto distance = Sq(tMiddle.x - middle.x) + Sq(tMiddle.y - middle.y);
switch (rectSide)
{
case RectSide::LEFT:
case RectSide::RIGHT:
isColliding = (Sq(tHalfSize.x + halfSize.x) >= distance);
isColliding = ((tHalfSize.x + halfSize.x) >= abs(tMiddle.x - middle.x));
break;
case RectSide::TOP:
case RectSide::BOTTOM:
isColliding = (Sq(tHalfSize.y + halfSize.y) >= distance);
isColliding = ((tHalfSize.y + halfSize.y) >= abs(tMiddle.y - middle.y));
break;
default:

87
Src/IAEngine/imp/cpp/Rendering/DebugDraw.cpp
View File

@ -21,6 +21,7 @@
#include <IAEngine/Rendering/GPUTexture.hpp>
#include <IAEngine/Rendering/Pipeline/UnlitMesh.hpp>
#include <IAEngine/Rendering/Renderer.hpp>
#include <IAEngine/Physics/Physics.hpp>
#include <SDL3/SDL_gpu.h>
@ -34,23 +35,6 @@ namespace ia::iae
ImGuiIO g_imGUIIO{};
struct ShapeLine
{
ImVec2 To{};
ImVec2 From{};
ImColor Color{};
FLOAT32 Thickness{1.0f};
BOOL Visibility{true};
};
struct ShapeRect
{
ImVec2 TopLeft{};
ImVec2 BottomRight{};
ImColor Color{};
BOOL Visibility{true};
};
struct UIWindow
{
PCCHAR Title{""};
@ -61,8 +45,6 @@ namespace ia::iae
};
Vector<UIWindow> g_debugUIWindows;
Vector<ShapeLine> g_lineShapes;
Vector<ShapeRect> g_rectShapes;
VOID DebugDraw::Initailize()
{
@ -107,47 +89,26 @@ namespace ia::iae
w.ContentDrawCallback();
ImGui::End();
}
const auto drawList = ImGui::GetForegroundDrawList();
for (const auto &t : g_lineShapes)
{
if (!t.Visibility)
continue;
drawList->AddLine(t.From, t.To, t.Color, t.Thickness);
}
for (const auto &t : g_rectShapes)
{
if (!t.Visibility)
continue;
drawList->AddRectFilled(t.TopLeft, t.BottomRight, t.Color);
}
Physics::DebugDraw();
}
Handle DebugDraw::AddLine(IN CONST glm::vec2 &from, IN CONST glm::vec2 &to, IN CONST glm::vec4 &color,
VOID DebugDraw::DrawLine(IN CONST glm::vec2 &from, IN CONST glm::vec2 &to, IN CONST glm::vec4 &color,
IN FLOAT32 thickness)
{
g_lineShapes.pushBack(ShapeLine{.To = ImVec2{to.x, to.y},
.From = ImVec2{from.x, from.y},
.Color = IM_COL32(color.x * 255, color.y * 255, color.z * 255, color.w * 255),
.Thickness = thickness});
return g_lineShapes.size() - 1;
const auto drawList = ImGui::GetForegroundDrawList();
drawList->AddLine(ImVec2(from.x, from.y), ImVec2(to.x, to.y), IM_COL32(color.x * 255, color.y * 255, color.z * 255, color.w * 255), thickness);
}
Handle DebugDraw::AddRect(IN CONST glm::vec2 &position, IN CONST glm::vec2 &size, IN CONST glm::vec4 &color)
VOID DebugDraw::DrawRect(IN CONST glm::vec2 &position, IN CONST glm::vec2 &size, IN CONST glm::vec4 &color, IN FLOAT32 thickness)
{
g_rectShapes.pushBack({
.TopLeft =
ImVec2{
position.x,
position.y,
},
.BottomRight =
ImVec2{
position.x + size.x,
position.y + size.y,
},
.Color = IM_COL32(color.x * 255, color.y * 255, color.z * 255, color.w * 255),
});
return g_rectShapes.size() - 1;
const auto drawList = ImGui::GetForegroundDrawList();
drawList->AddRect(ImVec2(position.x, position.y), ImVec2(position.x + size.x, position.y + size.y), IM_COL32(color.x * 255, color.y * 255, color.z * 255, color.w * 255), 0.0f, 0, thickness);
}
VOID DebugDraw::DrawRectFilled(IN CONST glm::vec2 &position, IN CONST glm::vec2 &size, IN CONST glm::vec4 &color)
{
const auto drawList = ImGui::GetForegroundDrawList();
drawList->AddRectFilled(ImVec2(position.x, position.y), ImVec2(position.x + size.x, position.y + size.y), IM_COL32(color.x * 255, color.y * 255, color.z * 255, color.w * 255));
}
Handle DebugDraw::AddUIWindow(IN PCCHAR title, IN CONST glm::vec2 &position, IN CONST glm::vec2 &size,
@ -157,31 +118,11 @@ namespace ia::iae
return g_debugUIWindows.size() - 1;
}
VOID DebugDraw::SetLineVisibility(IN Handle handle, IN BOOL visible)
{
g_lineShapes[handle].Visibility = visible;
}
VOID DebugDraw::SetRectVisibility(IN Handle handle, IN BOOL visible)
{
g_rectShapes[handle].Visibility = visible;
}
VOID DebugDraw::SetUIWindowVisibility(IN Handle handle, IN BOOL visible)
{
g_debugUIWindows[handle].Visibility = visible;
}
VOID DebugDraw::ToggleLineVisibility(IN Handle handle)
{
g_lineShapes[handle].Visibility = !g_lineShapes[handle].Visibility;
}
VOID DebugDraw::ToggleRectVisibility(IN Handle handle)
{
g_rectShapes[handle].Visibility = !g_rectShapes[handle].Visibility;
}
VOID DebugDraw::ToggleUIWindowVisibility(IN Handle handle)
{
g_debugUIWindows[handle].Visibility = !g_debugUIWindows[handle].Visibility;

2
Src/IAEngine/inc/IAEngine/Physics/Physics.hpp
View File

@ -33,7 +33,9 @@ namespace ia::iae
STATIC VOID Terminate();
STATIC VOID Update();
STATIC VOID DebugDraw();
friend class Engine;
friend class DebugDraw;
};
}

13
Src/IAEngine/inc/IAEngine/Rendering/DebugDraw.hpp
View File

@ -23,18 +23,17 @@ namespace ia::iae
class DebugDraw
{
public:
STATIC Handle AddLine(IN CONST glm::vec2& from, IN CONST glm::vec2& to, IN CONST glm::vec4& color, IN FLOAT32 thickness = 1.0f);
STATIC Handle AddRect(IN CONST glm::vec2& position, IN CONST glm::vec2& size, IN CONST glm::vec4& color);
STATIC Handle AddUIWindow(IN PCCHAR title, IN CONST glm::vec2 &position, IN CONST glm::vec2 &size,
IN std::function<VOID()> contentDrawCallback);
STATIC VOID SetLineVisibility(IN Handle handle, IN BOOL visible);
STATIC VOID SetRectVisibility(IN Handle handle, IN BOOL visible);
STATIC VOID ToggleUIWindowVisibility(IN Handle handle);
STATIC VOID SetUIWindowVisibility(IN Handle handle, IN BOOL visible);
STATIC VOID ToggleLineVisibility(IN Handle handle);
STATIC VOID ToggleRectVisibility(IN Handle handle);
STATIC VOID ToggleUIWindowVisibility(IN Handle handle);
public:
STATIC VOID DrawLine(IN CONST glm::vec2 &from, IN CONST glm::vec2 &to, IN CONST glm::vec4 &color,
IN FLOAT32 thickness = 1.0f);
STATIC VOID DrawRect(IN CONST glm::vec2 &position, IN CONST glm::vec2 &size, IN CONST glm::vec4 &color, IN FLOAT32 thickness = 1.0f);
STATIC VOID DrawRectFilled(IN CONST glm::vec2 &position, IN CONST glm::vec2 &size, IN CONST glm::vec4 &color);
private:
STATIC VOID Initailize();