Working on the web assembly openglES issue

1 files changed, 42 insertions, 0 deletions

diff --git a/src/util.c b/src/util.c
index 8165e11..692ae4b 100644
--- a/src/util.c
+++ b/src/util.c
@@ -81,3 +81,45 @@ void copyTriangle3D(Triangle3D a, const Triangle3D b) {
 	a[1] = b[1];
 	a[2] = b[2];
 }
+
+Vector3 getVertexAt(Mesh mesh, int vertexNum) {
+    return (Vector3){
+        mesh.vertices[vertexNum * 3],
+        mesh.vertices[vertexNum * 3 + 1],
+        mesh.vertices[vertexNum * 3 + 2]
+    };
+}
+
+void drawModelWireframe(Model model, Vector3 position, Quaternion rotation, Color color) {
+    // DrawModelWires doesn't work on the version of opengl that web assembly uses.
+    // Instead I use this stupid peice of shit.
+
+#if defined(GRAPHICS_API_OPENGL_11) || defined(GRAPHICS_API_OPENGL_33)
+    model.transform = QuaternionToMatrix(rotation);
+    DrawModelWires(model, position, 1.0, color);
+#else
+    for (int i = 0; i < model.meshCount; ++i) {
+        Mesh mesh = model.meshes[i];
+
+        // Loop through the triangles.
+        for (int triangleNum = 0; triangleNum < mesh.triangleCount; ++triangleNum) {
+            Triangle3D triangle = {
+                getVertexAt(mesh, triangleNum * 3),
+                getVertexAt(mesh, triangleNum * 3 + 1),
+                getVertexAt(mesh, triangleNum * 3 + 2)
+            };
+
+            // Rotation and transform.
+            for (int vertexNum = 0; vertexNum < 3; ++vertexNum) {
+                triangle[vertexNum] = Vector3RotateByQuaternion(triangle[vertexNum], rotation);
+                triangle[vertexNum] = Vector3Add(triangle[vertexNum], position);
+            }
+
+            // Draw.
+            DrawLine3D(triangle[0], triangle[1], color);
+            DrawLine3D(triangle[1], triangle[2], color);
+            DrawLine3D(triangle[2], triangle[0], color);
+        }
+    }
+#endif
+}