Allow reaxising mesh

src/dusk/asset/loader/display/assetmeshloader.c

@@ -79,10 +79,53 @@ errorret_t assetMeshLoader(assetfile_t *file) {
         );
       }
 
-      // Convert Z-Up to Y-Up
-      float_t temp = verts[i * 3 + j].pos[1];
-      verts[i * 3 + j].pos[1] = verts[i * 3 + j].pos[2];
-      verts[i * 3 + j].pos[2] = temp;
+      switch(output->inputAxis) {
+        case MESH_INPUT_AXIS_Z_UP:
+          // Convert Z-Up to Y-Up
+          {
+            float_t temp = verts[i * 3 + j].pos[1];
+            verts[i * 3 + j].pos[1] = verts[i * 3 + j].pos[2];
+            verts[i * 3 + j].pos[2] = temp;
+          }
+          break;
+
+        case MESH_INPUT_AXIS_X_UP:
+          // Convert X-Up to Y-Up
+          {
+            float_t temp = verts[i * 3 + j].pos[0];
+            verts[i * 3 + j].pos[0] = verts[i * 3 + j].pos[1];
+            verts[i * 3 + j].pos[1] = temp;
+          }
+          break;
+
+        case MESH_INPUT_AXIS_Y_DOWN:
+          // Invert Y axis
+          verts[i * 3 + j].pos[1] = -verts[i * 3 + j].pos[1];
+          break;
+
+        case MESH_INPUT_AXIS_Z_DOWN:
+          // Convert Z-Up to Y-Up and invert Y axis
+          {
+            float_t temp = verts[i * 3 + j].pos[1];
+            verts[i * 3 + j].pos[1] = -verts[i * 3 + j].pos[2];
+            verts[i * 3 + j].pos[2] = temp;
+          }
+          break;
+
+        case MESH_INPUT_AXIS_X_DOWN:
+          // Convert X-Up to Y-Up and invert Y axis
+          {
+            float_t temp = verts[i * 3 + j].pos[0];
+            verts[i * 3 + j].pos[0] = verts[i * 3 + j].pos[1];
+            verts[i * 3 + j].pos[1] = -temp;
+          }
+          break;
+
+        case MESH_INPUT_AXIS_Y_UP:
+        default:
+          // No covnersion possible / Needed
+          break;
+      }
     }
   }
 
@@ -108,15 +151,32 @@ errorret_t assetMeshLoader(assetfile_t *file) {
   errorOk();
 }
 
+errorret_t assetMeshLoadToOutput(
+  const char_t *path,
+  assetmeshoutput_t *output
+) {
+  assertNotNull(path, "Path cannot be null");
+  assertNotNull(output, "Output cannot be null");
+  assertNotNull(output->outMesh, "Output mesh cannot be null");
+  assertNotNull(output->outVertices, "Output vertices cannot be null");
+  
+  return assetLoad(path, &assetMeshLoader, NULL, output);
+}
+
 errorret_t assetMeshLoad(
   const char_t *path,
   mesh_t *outMesh,
-  meshvertex_t **outVertices
+  meshvertex_t **outVertices,
+  const assetmeshinputaxis_t inputAxis
 ) {
   assertNotNull(path, "Path cannot be null");
   assertNotNull(outMesh, "Output mesh cannot be null");
   assertNotNull(outVertices, "Output vertices cannot be null");
   
-  assetmeshoutput_t output = { outMesh, outVertices };
-  return assetLoad(path, &assetMeshLoader, NULL, &output);
+  assetmeshoutput_t output = {
+    outMesh,
+    outVertices,
+    inputAxis
+  };
+  return assetMeshLoadToOutput(path, &output);
 }

src/dusk/asset/loader/display/assetmeshloader.h

@@ -10,9 +10,20 @@
 #include "display/mesh/mesh.h"
 #include "assert/assert.h"
 
+typedef enum {
+  MESH_INPUT_AXIS_Y_UP,// Default
+  MESH_INPUT_AXIS_Z_UP,
+  MESH_INPUT_AXIS_X_UP,
+
+  MESH_INPUT_AXIS_Y_DOWN,
+  MESH_INPUT_AXIS_Z_DOWN,
+  MESH_INPUT_AXIS_X_DOWN,
+} assetmeshinputaxis_t;
+
 typedef struct {
   mesh_t *outMesh;
   meshvertex_t **outVertices;
+  assetmeshinputaxis_t inputAxis;
 } assetmeshoutput_t;
 
 #pragma pack(push, 1)
@@ -37,10 +48,14 @@ errorret_t assetMeshLoader(assetfile_t *file);
  * Handler for mesh assets.
  * 
  * @param file Asset file to load the mesh from.
+ * @param outMesh Output mesh to load the data into.
+ * @param outVertices Output pointer to the vertex data, used for cleanup.
+ * @param inputAxis The axis orientation of the input mesh data.
  * @return Any error that occurs during loading.
  */
 errorret_t assetMeshLoad(
   const char_t *path,
   mesh_t *outMesh,
-  meshvertex_t **outVertices
+  meshvertex_t **outVertices,
+  const assetmeshinputaxis_t inputAxis
 );

src/dusk/display/mesh/mesh.c

@@ -8,6 +8,7 @@
 #include "mesh.h"
 #include "util/memory.h"
 #include "assert/assert.h"
+#include "util/math.h"
 
 errorret_t meshInit(
   mesh_t *mesh,
@@ -75,6 +76,29 @@ errorret_t meshDraw(
   errorOk();
 }
 
+void meshGetBounds(
+  const mesh_t *mesh,
+  vec3 outMin,
+  vec3 outMax
+) {
+  assertNotNull(mesh, "Mesh cannot be NULL");
+  assertNotNull(outMin, "Output min cannot be NULL");
+  assertNotNull(outMax, "Output max cannot be NULL");
+  
+  for(int i = 0; i < 3; i++) {
+    outMin[i] = FLT_MAX;
+    outMax[i] = -FLT_MAX;
+  }
+
+  for(uint32_t i = 0; i < mesh->vertexCount; i++) {
+    meshvertex_t vert = mesh->vertices[i];
+    for(int j = 0; j < 3; j++) {
+      outMin[j] = mathMin(outMin[j], vert.pos[j]);
+      outMax[j] = mathMax(outMax[j], vert.pos[j]);
+    }
+  }
+}
+
 int32_t meshGetVertexCount(const mesh_t *mesh) {
   assertNotNull(mesh, "Mesh cannot be NULL");
   return meshGetVertexCountPlatform(mesh);

src/dusk/display/mesh/mesh.h

@@ -70,6 +70,19 @@ errorret_t meshDraw(
   const int32_t vertexCount
 );
 
+/**
+ * Gets the axis-aligned bounding box of a mesh.
+ * 
+ * @param mesh The mesh to get the bounds of.
+ * @param outMin Output parameter for the minimum corner of the bounding box.
+ * @param outMax Output parameter for the maximum corner of the bounding box.
+ */
+void meshGetBounds(
+  const mesh_t *mesh,
+  vec3 outMin,
+  vec3 outMax
+);
+
 /**
  * Gets the vertex count of a mesh.
  * 

src/dusk/engine/engine.c

@@ -52,8 +52,8 @@ errorret_t engineInit(const int32_t argc, const char_t **argv) {
   // FOF
   entityid_t cam = entityManagerAdd();
   componentid_t camPos = entityAddComponent(cam, COMPONENT_TYPE_POSITION);
-  float_t distance = 200.0f;
-  float_t up = 50.0f;
+  float_t distance = 1.5f;
+  float_t up = distance / 2.0f;
   entityPositionLookAt(
     cam,
     camPos,
@@ -69,9 +69,18 @@ errorret_t engineInit(const int32_t argc, const char_t **argv) {
   ent1Mesh = entityAddComponent(ent1, COMPONENT_TYPE_MESH);
   ent1Mat = entityAddComponent(ent1, COMPONENT_TYPE_MATERIAL);
 
-  errorChain(assetMeshLoad("test/test.stl", &loadedMesh, &loadedVertices));
+  errorChain(assetMeshLoad(
+    "test/Mei.stl",
+    &loadedMesh,
+    &loadedVertices,
+    MESH_INPUT_AXIS_Y_UP
+  ));
   entityMeshSetMesh(ent1, ent1Mesh, &loadedMesh);
 
+  vec3 min, max;
+  meshGetBounds(&loadedMesh, min, max);
+  printf("Mesh bounds: min(%f, %f, %f), max(%f, %f, %f)\n", min[0], min[1], min[2], max[0], max[1], max[2]);
+
   shadermaterial_t *mat = entityMaterialGetShaderMaterial(ent1, ent1Mat);
   mat->unlit.color = COLOR_WHITE;