working collision!

src/game/Level.cpp

@@ -212,6 +212,44 @@ namespace Game
         UpdatePlayerInputMode();
     }
 
+    bool IsOnGround(Level& level, Vec3 worldPos)
+    {
+        for (auto& puz : level.Puzzles)
+        {
+            Vec3 offsetToPuzzle =
+                worldPos - puz.WorldPosition + (Vec3{0.5f, 0.0f, 0.5f} * Puzzle::Config::CardScaleWorld);
+            Vec3 scaledOffset = offsetToPuzzle / Puzzle::Config::CardScaleWorld;
+            int32_t offsetX = (int32_t)bx::floor(scaledOffset.x);
+            int32_t offsetY = (int32_t)bx::floor(scaledOffset.z);
+            if (offsetX >= 0 && offsetX < puz.Data.WidthTiles / 2 && offsetY >= 0 && offsetY < puz.Data.HeightTiles / 2)
+            {
+                auto& card = puz.Data.PlacedCards[offsetY * Puzzle::Config::MaxPuzzleSizeCards + offsetX];
+                if (card.RefCard.Idx == UINT16_MAX)
+                {
+                    return true;
+                }
+
+                auto& refCard = Puzzle::GetStaticPuzzleData().Cards[card.RefCard.Idx];
+                if (!IsValid(refCard.BaseModelHandle))
+                {
+                    LOG_WARN("missing base model! @ %i %i", offsetX, offsetY);
+                    return true;
+                }
+
+                auto& heightmap = GameRendering::Get().Models[refCard.BaseModelHandle.ModelIdx].Height;
+                float fracOffsetX = scaledOffset.x - offsetX;
+                float fracOffsetY = scaledOffset.z - offsetY;
+                int32_t xPos = (int32_t)(fracOffsetX * heightmap.Width);
+                int32_t yPos = (int32_t)(fracOffsetY * heightmap.Height);
+                uint8_t height = heightmap.Values[yPos * heightmap.Width + xPos];
+
+                LOG("Height: %u", height);
+                return height > 230;
+            }
+        }
+        return false;
+    }
+
     void Level::Update()
     {
         ZoneScopedN("Level update");
@@ -263,9 +301,15 @@ namespace Game
         }
         else if (player.CameraM == CameraMode::Walk)
         {
-            TranslateLocal(player.PlayerCamTransform, {0.0f, 0.0f, inputVec.z});
-            TranslateLocal(player.PlayerCamTransform, {inputVec.x, 0.0f, 0.0f});
-            player.PlayerCamTransform.Position.y = 3.0f;
+            auto newTransform = player.PlayerCamTransform;
+            TranslateLocal(newTransform, {0.0f, 0.0f, inputVec.z});
+            TranslateLocal(newTransform, {inputVec.x, 0.0f, 0.0f});
+            newTransform.Position.y = 3.0f;
+
+            if (IsOnGround(*this, newTransform.Position))
+            {
+                player.PlayerCamTransform = newTransform;
+            }
 
             player.WalkXRot += rotInput.x;
             player.WalkYRot += rotInput.y;

src/game/Mesh.cpp

@@ -13,7 +13,6 @@
 #include "rendering/Rendering.h"
 
 #include "Instance.h"
-#include <cfloat>
 #include <cstdint>
 
 #define TINYGLTF_IMPLEMENTATION
@@ -129,8 +128,8 @@ namespace Game
                 {
                     float uPos = mesh.MinPos.x + (float)u / HeightMap::Width * mesh.Size.x;
 
-                    Gen::Vec3 rayStart = {uPos, mesh.MinPos.y, vPos};
-                    Gen::Vec3 rayEnd = {uPos, mesh.MaxPos.y, vPos};
+                    Gen::Vec3 rayStart = {uPos, -100.0f, vPos};
+                    Gen::Vec3 rayEnd = {uPos, 100.0f, vPos};
                     Gen::Vec3 ptOut;
 
                     for (int16_t i = 0; i < indexBufferView.byteLength; i += indexStride * 3)
@@ -148,7 +147,7 @@ namespace Game
                             reinterpret_cast<Gen::Vec3*>(&posBuffer.data[posBufferView.byteOffset + *idxC * posStride]);
                         if (Gen::RayTriangleIntersect(rayStart, rayEnd, *triA, *triB, *triC, ptOut))
                         {
-                            float len = ptOut.y - mesh.MinPos.y;
+                            float len = ptOut.y - rayStart.y;
                             uint8_t val = (uint8_t)(len / mesh.Size.y * UINT8_MAX);
                             int32_t idx = v * HeightMap::Width + u;
                             if (mesh.Height.Values[idx] < val)

src/game/Tools.cpp

@@ -278,6 +278,8 @@ namespace Tools
                 level.Setup(shared.Game);
             }
 
+            ImGui::DragFloat3("Player Pos", &player.PlayerCamTransform.Position.x);
+            ImGui::DragFloat3("Puz0 Pos", &level.Puzzles[0].WorldPosition.x);
             ImGui::SliderFloat("Mouse Sensitivity", &player.MouseSensitivity, 0.1f, 5.0f);
             ImGui::SliderFloat("Player Speed", &player.MovementSpeed, 1.0f, 30.0f);
 

tools/radsession.rad

@@ -1,9 +1,10 @@
 // raddbg 0.9.19 project file
 
+recent_file: path: "../src/game/level.cpp"
+recent_file: path: "../src/game/Log.cpp"
 recent_file: path: "../src/game/rendering/dither.cpp"
 recent_file: path: "../src/game/rendering/rendering.cpp"
 recent_file: path: "../src/game/entity.h"
-recent_file: path: "../src/game/level.cpp"
 recent_file: path: "../src/game/ui.cpp"
 recent_file: path: "../src/gen/generated.cpp"
 recent_file: path: "../src/engine/main.cpp"
@@ -13,7 +14,6 @@ recent_file: path: "../src/game/tools.cpp"
 recent_file: path: "../src/dependency/bgfx.cmake/bx/src/debug.cpp"
 recent_file: path: "../src/gen/def.h"
 recent_file: path: "../src/game/global.cpp"
-recent_file: path: "../src/game/Log.cpp"
 target:
 {
   executable: "../src/cmake-build/PuzGameEngine.exe"