feat: add debug rendering for other types of colliders / split game into more logical functions / files

2026-10-16 15:08:10 +02:00
parent 4c9b77c948
commit 469bb287b7
32 changed files with 42809 additions and 882 deletions
@@ -0,0 +1,52 @@
+#include <destrum/Graphics/Resources/PrimitiveMeshes.h>
+
+#include <array>
+#include <cstdint>
+
+CPUMesh PrimitiveMeshes::MakeBox(const glm::vec3& size)
+{
+    struct Face {
+        glm::vec3 normal;
+        glm::vec3 tangent;
+    };
+    constexpr std::array<Face, 6> faces{{
+        {{1.0f, 0.0f, 0.0f}, {0.0f, 0.0f, -1.0f}},
+        {{-1.0f, 0.0f, 0.0f}, {0.0f, 0.0f, 1.0f}},
+        {{0.0f, 1.0f, 0.0f}, {1.0f, 0.0f, 0.0f}},
+        {{0.0f, -1.0f, 0.0f}, {1.0f, 0.0f, 0.0f}},
+        {{0.0f, 0.0f, 1.0f}, {1.0f, 0.0f, 0.0f}},
+        {{0.0f, 0.0f, -1.0f}, {-1.0f, 0.0f, 0.0f}},
+    }};
+    constexpr std::array<glm::vec2, 4> corners{{
+        {-1.0f, -1.0f}, {1.0f, -1.0f}, {1.0f, 1.0f}, {-1.0f, 1.0f},
+    }};
+
+    CPUMesh mesh{};
+    mesh.name = "Box";
+    mesh.minPos = -size * 0.5f;
+    mesh.maxPos = size * 0.5f;
+
+    for (const Face& face : faces) {
+        const glm::vec3 bitangent = glm::cross(face.normal, face.tangent);
+        const float width = glm::dot(glm::abs(face.tangent), size);
+        const float height = glm::dot(glm::abs(bitangent), size);
+        const auto first = static_cast<std::uint32_t>(mesh.vertices.size());
+
+        for (const glm::vec2& corner : corners) {
+            // v runs against the bitangent so images are upright on the side faces (w = -1 to match)
+            mesh.vertices.push_back(CPUMesh::Vertex{
+                .position = (face.normal + face.tangent * corner.x + bitangent * corner.y) * size * 0.5f,
+                .uv_x = (corner.x + 1.0f) * 0.5f * width,
+                .normal = face.normal,
+                .uv_y = (1.0f - corner.y) * 0.5f * height,
+                .tangent = glm::vec4{face.tangent, -1.0f},
+            });
+        }
+
+        for (const std::uint32_t index : {0u, 1u, 2u, 0u, 2u, 3u}) {
+            mesh.indices.push_back(first + index);
+        }
+    }
+
+    return mesh;
+}