add networking, 3d improvements, reorganize src structure

src/gfx/pxl8_mesh.h

@@ -0,0 +1,124 @@
+#pragma once
+
+#include "pxl8_math.h"
+#include "pxl8_types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define PXL8_MESH_MAX_VERTICES 65536
+#define PXL8_MESH_MAX_INDICES  65536
+
+typedef enum pxl8_blend_mode {
+    PXL8_BLEND_OPAQUE = 0,
+    PXL8_BLEND_ALPHA_TEST,
+    PXL8_BLEND_ALPHA,
+    PXL8_BLEND_ADDITIVE,
+} pxl8_blend_mode;
+
+typedef struct pxl8_material {
+    u32 texture_id;
+    u8 alpha;
+    u8 blend_mode;
+    bool dither;
+    bool double_sided;
+    bool dynamic_lighting;
+    bool per_pixel;
+    bool vertex_color_passthrough;
+    f32 emissive_intensity;
+} pxl8_material;
+
+typedef struct pxl8_vertex {
+    pxl8_vec3 position;
+    pxl8_vec3 normal;
+    f32 u, v;
+    u8 color;
+    u8 light;
+    u8 _pad[2];
+} pxl8_vertex;
+
+typedef struct pxl8_mesh {
+    pxl8_vertex* vertices;
+    u16* indices;
+    u32 vertex_count;
+    u32 index_count;
+    u32 vertex_capacity;
+    u32 index_capacity;
+} pxl8_mesh;
+
+pxl8_mesh* pxl8_mesh_create(u32 vertex_capacity, u32 index_capacity);
+void pxl8_mesh_destroy(pxl8_mesh* mesh);
+void pxl8_mesh_clear(pxl8_mesh* mesh);
+
+u16 pxl8_mesh_push_vertex(pxl8_mesh* mesh, pxl8_vertex v);
+void pxl8_mesh_push_triangle(pxl8_mesh* mesh, u16 i0, u16 i1, u16 i2);
+void pxl8_mesh_push_quad(pxl8_mesh* mesh, u16 i0, u16 i1, u16 i2, u16 i3);
+
+void pxl8_mesh_push_box(pxl8_mesh* mesh, pxl8_vec3 center, pxl8_vec3 half_extents, u8 color);
+void pxl8_mesh_push_box_uv(pxl8_mesh* mesh, pxl8_vec3 center, pxl8_vec3 half_extents, u8 color, f32 u_scale, f32 v_scale);
+
+static inline u32 pxl8_mesh_triangle_count(const pxl8_mesh* mesh) {
+    return mesh->index_count / 3;
+}
+
+static inline pxl8_material pxl8_material_create(u32 texture_id) {
+    return (pxl8_material){
+        .texture_id = texture_id,
+        .alpha = 255,
+        .blend_mode = PXL8_BLEND_OPAQUE,
+        .dither = true,
+        .double_sided = false,
+        .dynamic_lighting = false,
+        .per_pixel = false,
+        .vertex_color_passthrough = false,
+        .emissive_intensity = 0.0f,
+    };
+}
+
+static inline pxl8_material pxl8_material_with_alpha(pxl8_material m, u8 alpha) {
+    m.alpha = alpha;
+    if (alpha < 255 && m.blend_mode == PXL8_BLEND_OPAQUE) {
+        m.blend_mode = PXL8_BLEND_ALPHA;
+    }
+    return m;
+}
+
+static inline pxl8_material pxl8_material_with_blend(pxl8_material m, pxl8_blend_mode mode) {
+    m.blend_mode = mode;
+    return m;
+}
+
+static inline pxl8_material pxl8_material_with_double_sided(pxl8_material m) {
+    m.double_sided = true;
+    return m;
+}
+
+static inline pxl8_material pxl8_material_with_emissive(pxl8_material m, f32 intensity) {
+    m.emissive_intensity = intensity;
+    return m;
+}
+
+static inline pxl8_material pxl8_material_with_lighting(pxl8_material m) {
+    m.dynamic_lighting = true;
+    return m;
+}
+
+static inline pxl8_material pxl8_material_with_no_dither(pxl8_material m) {
+    m.dither = false;
+    return m;
+}
+
+static inline pxl8_material pxl8_material_with_passthrough(pxl8_material m) {
+    m.vertex_color_passthrough = true;
+    return m;
+}
+
+static inline pxl8_material pxl8_material_with_per_pixel(pxl8_material m) {
+    m.per_pixel = true;
+    return m;
+}
+
+#ifdef __cplusplus
+}
+#endif