add honey_mesh and assorted related functions

1 files changed, 59 insertions, 0 deletions

diff --git a/include/mesh.h b/include/mesh.h
new file mode 100644
index 0000000..2040f44
--- /dev/null
+++ b/include/mesh.h
@@ -0,0 +1,59 @@
+/** @brief Defines the honey_mesh struct and related basic mesh functions. */
+
+#ifndef HONEY_MESH_H
+#define HONEY_MESH_H
+
+#include "common.h"
+#include "shader.h"
+
+enum honey_mesh_result {
+  MESH_OK,
+  MEMORY_ERROR,
+  BAD_VERTEX_DATA,
+  BAD_INDEX_DATA,
+  N_MESH_RESULTS };
+
+typedef struct {
+  float* vertices;
+  unsigned int n_vertices;
+  unsigned int* indices;
+  unsigned int n_indices;
+  unsigned int vertex_array, vertex_buffer, element_buffer;
+} honey_mesh;
+
+/** @brief Create a new mesh from vertex and index arrays.
+ *
+ * Note that this function creates copies of the vertex and index arrays, 
+ * so you can deallocate those immediately.
+ *
+ * @param[out] mesh Pointer to the destination honey_mesh struct
+ * @param[in] vertices Array of floats representing the vertices
+ * @param[in] n_attributes The number of attributes per vertex
+ * @param[in] attribute_sizes An array containing for each attribute how many floats it contains
+ * @param[in] n_vertices The number of vertices (NOT the number of floats in the vertex array)
+ * @param[in] indices Array of vertex indices
+ * @param[in] n_indices The number of elements in the index array
+ */
+enum honey_mesh_result honey_mesh_new(honey_mesh* mesh,
+                                      float* vertices,
+                                      unsigned int n_vertices,
+                                      unsigned int n_attributes,
+                                      unsigned int* attribute_sizes,
+                                      unsigned int* indices,
+                                      unsigned int n_indices);
+
+/** @brief Draw a mesh on screen.
+ *
+ * @param[in] mesh The mesh to draw
+ * @param[in] shader The shader to use when drawing the mesh
+ */
+void honey_mesh_draw(honey_mesh mesh,
+                     honey_shader shader);
+
+/** @brief Delete a mesh.
+ *
+ * @param[in] mesh The mesh to delete
+ */
+void honey_mesh_delete(honey_mesh mesh);
+  
+#endif