example: add moai

example/example.mk

@@ -910,14 +910,28 @@ example/castle.elf: $(START_OBJ) $(CASTLE_OBJ)
 
 GRADIENT_OBJ = \
 	example/gradient.o \
+	texture/gradient/gradient.data.o \
+	example/moai.o \
 	holly/core.o \
 	holly/region_array.o \
 	holly/background.o \
 	holly/ta_fifo_polygon_converter.o \
 	holly/video_output.o \
 	sh7091/serial.o \
-	texture/gradient/gradient.data.o \
 	$(LIBGCC)
 
 example/gradient.elf: LDSCRIPT = $(LIB)/main.lds
 example/gradient.elf: $(START_OBJ) $(GRADIENT_OBJ)
+
+MOAI_OBJ = \
+	example/moai.o \
+	holly/core.o \
+	holly/region_array.o \
+	holly/background.o \
+	holly/ta_fifo_polygon_converter.o \
+	holly/video_output.o \
+	sh7091/serial.o \
+	$(LIBGCC)
+
+example/moai.elf: LDSCRIPT = $(LIB)/main.lds
+example/moai.elf: $(START_OBJ) $(MOAI_OBJ)

example/moai.cpp

@@ -0,0 +1,538 @@
+#include <stdint.h>
+
+#include "holly/background.hpp"
+#include "holly/core.hpp"
+#include "holly/core_bits.hpp"
+#include "holly/holly.hpp"
+#include "holly/isp_tsp.hpp"
+#include "holly/region_array.hpp"
+#include "holly/ta_bits.hpp"
+#include "holly/ta_fifo_polygon_converter.hpp"
+#include "holly/ta_global_parameter.hpp"
+#include "holly/ta_parameter.hpp"
+#include "holly/ta_vertex_parameter.hpp"
+#include "holly/texture_memory_alloc4.hpp"
+#include "holly/video_output.hpp"
+
+#include "sh7091/sh7091.hpp"
+#include "sh7091/sh7091_bits.hpp"
+#include "sh7091/serial.hpp"
+#include "sh7091/vbr.hpp"
+
+#include "systembus.hpp"
+#include "systembus_bits.hpp"
+
+#include "memorymap.hpp"
+
+#include "math/vec2.hpp"
+#include "math/vec3.hpp"
+#include "math/vec4.hpp"
+#include "math/mat4x4.hpp"
+
+using vec2 = vec<2, float>;
+using vec3 = vec<3, float>;
+using vec4 = vec<4, float>;
+using mat4x4 = mat<4, 4, float>;
+
+#include "model/model.h"
+#include "model/moai/material.h"
+#include "model/moai/model.h"
+
+void vbr100()
+{
+  serial::string("vbr100\n");
+  serial::string("expevt ");
+  serial::integer<uint16_t>(sh7091.CCN.EXPEVT);
+  serial::string("intevt ");
+  serial::integer<uint16_t>(sh7091.CCN.INTEVT);
+  serial::string("tra ");
+  serial::integer<uint16_t>(sh7091.CCN.TRA);
+
+  uint32_t spc;
+  uint32_t ssr;
+  asm volatile ("stc spc,%0" : "=r" (spc));
+  asm volatile ("stc ssr,%0" : "=r" (ssr));
+  serial::string("spc ");
+  serial::integer(spc);
+  serial::string("ssr ");
+  serial::integer(ssr);
+
+  while (1);
+}
+
+void vbr400()
+{
+  serial::string("vbr400");
+  serial::string("expevt ");
+  serial::integer<uint16_t>(sh7091.CCN.EXPEVT);
+  serial::string("intevt ");
+  serial::integer<uint16_t>(sh7091.CCN.INTEVT);
+  serial::string("tra ");
+  serial::integer<uint16_t>(sh7091.CCN.TRA);
+
+  uint32_t spc;
+  uint32_t ssr;
+  asm volatile ("stc spc,%0" : "=r" (spc));
+  asm volatile ("stc ssr,%0" : "=r" (ssr));
+  serial::string("spc ");
+  serial::integer(spc);
+  serial::string("ssr ");
+  serial::integer(ssr);
+
+  while (1);
+}
+
+static int render_done = 0;
+
+void vbr600()
+{
+  if (sh7091.CCN.EXPEVT == 0 && sh7091.CCN.INTEVT == 0x320) {
+    uint32_t istnrm = system.ISTNRM;
+    uint32_t isterr = system.ISTERR;
+
+    if (isterr) {
+      serial::string("isterr: ");
+      serial::integer<uint32_t>(system.ISTERR);
+    }
+
+    if (istnrm & istnrm::end_of_render_tsp) {
+      system.ISTNRM = istnrm::end_of_render_tsp
+                    | istnrm::end_of_render_isp
+                    | istnrm::end_of_render_video;
+      render_done = 1;
+      return;
+    }
+  }
+
+  serial::string("vbr600");
+  serial::string("expevt ");
+  serial::integer<uint16_t>(sh7091.CCN.EXPEVT);
+  serial::string("intevt ");
+  serial::integer<uint16_t>(sh7091.CCN.INTEVT);
+  serial::string("tra ");
+  serial::integer<uint16_t>(sh7091.CCN.TRA);
+
+  serial::string("istnrm: ");
+  serial::integer<uint32_t>(system.ISTNRM);
+  serial::string("isterr: ");
+  serial::integer<uint32_t>(system.ISTERR);
+
+  uint32_t spc;
+  uint32_t ssr;
+  asm volatile ("stc spc,%0" : "=r" (spc));
+  asm volatile ("stc ssr,%0" : "=r" (ssr));
+  serial::string("spc ");
+  serial::integer(spc);
+  serial::string("ssr ");
+  serial::integer(ssr);
+
+  while (1);
+}
+
+void interrupt_init()
+{
+  system.IML2NRM = 0;
+  system.IML2ERR = 0;
+  system.IML2EXT = 0;
+
+  system.IML4NRM = 0;
+  system.IML4ERR = 0;
+  system.IML4EXT = 0;
+
+  system.IML6NRM = 0;
+  system.IML6ERR = 0;
+  system.IML6EXT = 0;
+
+  system.ISTERR = 0xffffffff;
+  system.ISTNRM = 0xffffffff;
+
+  sh7091.CCN.INTEVT = 0;
+  sh7091.CCN.EXPEVT = 0;
+
+  uint32_t vbr = reinterpret_cast<uint32_t>(&__vbr_link_start) - 0x100;
+  serial::string("vbr ");
+  serial::integer<uint32_t>(vbr);
+  serial::string("vbr100 ");
+  serial::integer<uint32_t>(reinterpret_cast<uint32_t>(&vbr100));
+
+  asm volatile ("ldc %0,vbr"
+		:
+		: "r" (vbr));
+
+  uint32_t sr;
+  asm volatile ("stc sr,%0"
+		: "=r" (sr));
+  serial::string("sr ");
+  serial::integer<uint32_t>(sr);
+
+  sr &= ~sh::sr::bl; // BL
+  sr &= ~sh::sr::imask(15); // imask
+
+  serial::string("sr ");
+  serial::integer<uint32_t>(sr);
+
+  asm volatile ("ldc %0,sr"
+		:
+		: "r" (sr));
+}
+
+void global_polygon_type_1(ta_parameter_writer& writer,
+                           uint32_t texture_address,
+                           uint32_t list,
+                           uint32_t cull)
+{
+  const uint32_t parameter_control_word = para_control::para_type::polygon_or_modifier_volume
+                                        | list
+                                        | obj_control::col_type::intensity_mode_1
+                                        | obj_control::gouraud
+                                        ;
+  const uint32_t isp_tsp_instruction_word = isp_tsp_instruction_word::depth_compare_mode::greater
+                                          | cull;
+
+  const uint32_t tsp_instruction_word = tsp_instruction_word::fog_control::no_fog
+                                      | tsp_instruction_word::src_alpha_instr::one
+                                      | tsp_instruction_word::dst_alpha_instr::zero
+                                      ;
+
+  const uint32_t texture_control_word = 0;
+
+  const float alpha = 1.0f;
+  const float r = 0.6f;
+  const float g = 0.6f;
+  const float b = 0.6f;
+
+  writer.append<ta_global_parameter::polygon_type_1>() =
+    ta_global_parameter::polygon_type_1(parameter_control_word,
+                                        isp_tsp_instruction_word,
+                                        tsp_instruction_word,
+                                        texture_control_word,
+                                        alpha,
+                                        r,
+                                        g,
+                                        b
+                                        );
+}
+
+static inline vec3 screen_transform(vec3 v)
+{
+  float dim = 480 / 2.0;
+
+  return {
+    v.x / v.z * dim + 640 / 2.0f,
+    v.y / v.z * dim + 480 / 2.0f,
+    1 / v.z,
+  };
+}
+
+static inline void render_quad(ta_parameter_writer& writer,
+                               vec3 ap,
+                               vec3 bp,
+                               vec3 cp,
+                               vec3 dp,
+                               float ai,
+                               float bi,
+                               float ci,
+                               float di)
+{
+  writer.append<ta_vertex_parameter::polygon_type_2>() =
+    ta_vertex_parameter::polygon_type_2(polygon_vertex_parameter_control_word(false),
+                                        ap.x, ap.y, ap.z,
+                                        ai);
+
+  writer.append<ta_vertex_parameter::polygon_type_2>() =
+    ta_vertex_parameter::polygon_type_2(polygon_vertex_parameter_control_word(false),
+                                        bp.x, bp.y, bp.z,
+                                        bi);
+
+  writer.append<ta_vertex_parameter::polygon_type_2>() =
+    ta_vertex_parameter::polygon_type_2(polygon_vertex_parameter_control_word(false),
+                                        dp.x, dp.y, dp.z,
+                                        di);
+
+  writer.append<ta_vertex_parameter::polygon_type_2>() =
+    ta_vertex_parameter::polygon_type_2(polygon_vertex_parameter_control_word(true),
+                                        cp.x, cp.y, cp.z,
+                                        ci);
+}
+
+constexpr inline mat4x4 screen_rotation(float theta)
+{
+  //float zt = -0.7853981633974483 + (0.2);
+  float zt = -0.7853981633974483 * 0;
+  float yt = -0.7853981633974483 * theta;
+  float xt = 0.7853981633974483 * 4;
+  //float xt = 0.7853981633974483 * 3.7;
+
+  mat4x4 rx = {
+    1, 0, 0, 0,
+    0, cos(xt), -sin(xt), 0,
+    0, sin(xt), cos(xt), 0,
+    0, 0, 0, 1,
+  };
+
+  mat4x4 ry = {
+     cos(yt), 0, sin(yt), 0,
+    0, 1, 0, 0,
+    -sin(yt), 0, cos(yt), 0,
+    0, 0, 0, 1,
+  };
+
+  mat4x4 rz = {
+    cos(zt), -sin(zt), 0, 0,
+    sin(zt), cos(zt), 0, 0,
+    0, 0, 1, 0,
+    0, 0, 0, 1,
+  };
+
+  mat4x4 t = {
+    1, 0, 0, 0,
+    0, 1, 0, 5.5,
+    0, 0, 1, 8.5,
+    0, 0, 0, 1,
+  };
+
+  return t * ry * rx * rz;
+}
+
+#define _fsrra(n) (1.0f / (__builtin_sqrtf(n)))
+
+static inline float inverse_length(vec3 v)
+{
+  float f = dot(v, v);
+  return _fsrra(f);
+}
+
+float light_intensity(vec3 light_vec, mat4x4& trans, vec3 n0)
+{
+  vec4 n1 = trans * (vec4){n0.x, n0.y, n0.z, 0.f}; // no translation component
+  vec3 n = {n1.x, n1.y, n1.z};
+  float n_dot_l = dot(n, light_vec);
+
+  float intensity = 0.5f;
+  if (n_dot_l > 0) {
+    intensity += 0.5f * n_dot_l * (inverse_length(n) * inverse_length(light_vec));
+    if (intensity > 1.0f)
+      intensity = 1.0f;
+  }
+  return intensity;
+}
+
+void render_moai(ta_parameter_writer& writer, const mat4x4& model_trans, const mat4x4& screen)
+{
+  vec3 light_vec = {20, 1, -20};
+
+  mat4x4 trans = screen * model_trans;
+
+  for (int i = 0; i < moai_ranu_raku_grey.quadrilateral_count; i++) {
+    //const union quadrilateral * quad = &moai_ranu_raku_grey_quadrilateral[i];
+    const union quadrilateral * quad = &moai_ranu_raku_grey_1_quadrilateral[i];
+    vec3 a = trans * moai_position[quad->v[0].position];
+    vec3 b = trans * moai_position[quad->v[1].position];
+    vec3 c = trans * moai_position[quad->v[2].position];
+    vec3 d = trans * moai_position[quad->v[3].position];
+
+    float ai = light_intensity(light_vec, trans, moai_normal[quad->v[0].normal]);
+    float bi = light_intensity(light_vec, trans, moai_normal[quad->v[1].normal]);
+    float ci = light_intensity(light_vec, trans, moai_normal[quad->v[2].normal]);
+    float di = light_intensity(light_vec, trans, moai_normal[quad->v[3].normal]);
+
+    render_quad(writer,
+                screen_transform(a),
+                screen_transform(b),
+                screen_transform(c),
+                screen_transform(d),
+                ai,
+                bi,
+                ci,
+                di);
+  }
+}
+
+void transfer_scene(ta_parameter_writer& writer)
+{
+  const float deg = 0.017453292519943295 / 4;
+  static float theta = deg;
+  const mat4x4 screen = screen_rotation(theta);
+
+  theta += deg;
+
+  // opaque
+  {
+    global_polygon_type_1(writer, texture_memory_alloc.texture.start,
+                          para_control::list_type::opaque,
+                          isp_tsp_instruction_word::culling_mode::cull_if_negative);
+    float scale = 0.1f;
+    float translate = 0.f;
+    const mat4x4 model = {
+      scale, 0, 0, 0,
+      0, scale, 0, 0,
+      0, 0, -scale, translate,
+      0, 0, 0, 1,
+    };
+    render_moai(writer, model, screen);
+  }
+
+  // end of opaque list
+  writer.append<ta_global_parameter::end_of_list>() =
+    ta_global_parameter::end_of_list(para_control::para_type::end_of_list);
+}
+
+void transfer_ta_fifo_texture_memory_32byte(void * dst, void * src, int length)
+{
+  uint32_t out_addr = (uint32_t)dst;
+  sh7091.CCN.QACR0 = ((reinterpret_cast<uint32_t>(out_addr) >> 24) & 0b11100);
+  sh7091.CCN.QACR1 = ((reinterpret_cast<uint32_t>(out_addr) >> 24) & 0b11100);
+
+  volatile uint32_t * base = &store_queue[(out_addr & 0x03ffffc0) / 4];
+  uint32_t * src32 = reinterpret_cast<uint32_t *>(src);
+
+  length = (length + 31) & ~31; // round up to nearest multiple of 32
+  while (length > 0) {
+    base[0] = src32[0];
+    base[1] = src32[1];
+    base[2] = src32[2];
+    base[3] = src32[3];
+    base[4] = src32[4];
+    base[5] = src32[5];
+    base[6] = src32[6];
+    base[7] = src32[7];
+    asm volatile ("pref @%0"
+                  :                // output
+                  : "r" (&base[0]) // input
+                  : "memory");
+    length -= 32;
+    base += 8;
+    src32 += 8;
+  }
+}
+
+void transfer_textures()
+{
+  system.LMMODE0 = 0; // 64-bit address space
+  system.LMMODE1 = 0; // 64-bit address space
+
+  /*
+  {
+    uint32_t offset = texture_memory_alloc.texture.start;
+    void * dst = reinterpret_cast<void *>(&ta_fifo_texture_memory[offset / 4]);
+    void * src = reinterpret_cast<void *>(&_binary_model_dragon_dragon_data_start);
+    uint32_t size = reinterpret_cast<uint32_t>(&_binary_model_dragon_dragon_data_size);
+    transfer_ta_fifo_texture_memory_32byte(dst, src, size);
+  }
+
+  {
+    uint32_t offset = texture_memory_alloc.texture.start + 131072;
+    void * dst = reinterpret_cast<void *>(&ta_fifo_texture_memory[offset / 4]);
+    void * src = reinterpret_cast<void *>(&_binary_model_dragon_chrome_data_start);
+    uint32_t size = reinterpret_cast<uint32_t>(&_binary_model_dragon_chrome_data_size);
+    transfer_ta_fifo_texture_memory_32byte(dst, src, size);
+  }
+  */
+}
+
+void transfer_palette()
+{
+  holly.PAL_RAM_CTRL = pal_ram_ctrl::pixel_format::rgb565;
+
+  /*
+  uint16_t * src = reinterpret_cast<uint16_t *>(&_binary_model_dragon_dragon_data_pal_start);
+  uint32_t size = reinterpret_cast<uint32_t>(&_binary_model_dragon_dragon_data_pal_size);
+
+  for (uint32_t i = 0; i < size / 2; i++) {
+    holly.PALETTE_RAM[i] = src[i];
+  }
+  */
+}
+
+uint8_t __attribute__((aligned(32))) ta_parameter_buf[1024 * 1024];
+
+void main()
+{
+  serial::init(0);
+
+  serial::integer<uint32_t>((sizeof (moai_position)) / (sizeof (moai_position[0])));
+
+  interrupt_init();
+
+  constexpr uint32_t ta_alloc = 0
+                              | ta_alloc_ctrl::pt_opb::no_list
+			      | ta_alloc_ctrl::tm_opb::no_list
+                              | ta_alloc_ctrl::t_opb::no_list
+                              | ta_alloc_ctrl::om_opb::no_list
+                              | ta_alloc_ctrl::o_opb::_16x4byte;
+
+  constexpr int render_passes = 1;
+  constexpr struct opb_size opb_size[render_passes] = {
+    {
+      .opaque = 16 * 4,
+      .opaque_modifier = 0,
+      .translucent = 0,
+      .translucent_modifier = 0,
+      .punch_through = 0
+    }
+  };
+
+  holly.SOFTRESET = softreset::pipeline_soft_reset
+		  | softreset::ta_soft_reset;
+  holly.SOFTRESET = 0;
+
+  core_init();
+
+  system.IML6NRM = istnrm::end_of_render_tsp;
+
+  const int framebuffer_width = 640;
+  const int framebuffer_height = 480;
+  const int tile_width = framebuffer_width / 32;
+  const int tile_height = framebuffer_height / 32;
+
+  for (int i = 0; i < 2; i++) {
+    region_array_multipass(tile_width,
+                           tile_height,
+                           opb_size,
+                           render_passes,
+                           texture_memory_alloc.region_array[i].start,
+                           texture_memory_alloc.object_list[i].start);
+
+    background_parameter2(texture_memory_alloc.background[i].start,
+                          0xff202040);
+  }
+
+  int ta = 0;
+  int core = 0;
+
+  ta_parameter_writer writer = ta_parameter_writer(ta_parameter_buf);
+
+  transfer_textures();
+  transfer_palette();
+  video_output::set_mode_vga();
+
+  while (1) {
+    ta_polygon_converter_init2(texture_memory_alloc.isp_tsp_parameters[ta].start,
+			       texture_memory_alloc.isp_tsp_parameters[ta].end,
+			       texture_memory_alloc.object_list[ta].start,
+			       texture_memory_alloc.object_list[ta].end,
+			       opb_size[0].total(),
+			       ta_alloc,
+			       tile_width,
+			       tile_height);
+    writer.offset = 0;
+    transfer_scene(writer);
+    ta_polygon_converter_writeback(writer.buf, writer.offset);
+    ta_polygon_converter_transfer(writer.buf, writer.offset);
+    ta_wait_opaque_list();
+
+    render_done = 0;
+    core_start_render2(texture_memory_alloc.region_array[core].start,
+                       texture_memory_alloc.isp_tsp_parameters[core].start,
+                       texture_memory_alloc.background[core].start,
+                       texture_memory_alloc.framebuffer[core].start,
+                       framebuffer_width);
+    while (render_done == 0) {
+      asm volatile ("nop");
+    };
+
+    while (!spg_status::vsync(holly.SPG_STATUS));
+    holly.FB_R_SOF1 = texture_memory_alloc.framebuffer[ta].start;
+    while (spg_status::vsync(holly.SPG_STATUS));
+  }
+}

example/modifier_volume_cube_hosted.cpp

@@ -236,33 +236,36 @@ static inline void render_quad(ta_parameter_writer& writer,
 }
 
 static inline void render_quad_type2(ta_parameter_writer& writer,
-                                     float intensity,
                                      vec3 ap,
                                      vec3 bp,
                                      vec3 cp,
-                                     vec3 dp)
+                                     vec3 dp,
+                                     float ai,
+                                     float bi,
+                                     float ci,
+                                     float di)
 {
 #ifdef LINE_DRAWING
 #else
   writer.append<ta_vertex_parameter::polygon_type_2>() =
     ta_vertex_parameter::polygon_type_2(polygon_vertex_parameter_control_word(false),
                                         ap.x, ap.y, ap.z,
-                                        intensity);
+                                        ai);
 
   writer.append<ta_vertex_parameter::polygon_type_2>() =
     ta_vertex_parameter::polygon_type_2(polygon_vertex_parameter_control_word(false),
                                         bp.x, bp.y, bp.z,
-                                        intensity);
+                                        bi);
 
   writer.append<ta_vertex_parameter::polygon_type_2>() =
     ta_vertex_parameter::polygon_type_2(polygon_vertex_parameter_control_word(false),
                                         dp.x, dp.y, dp.z,
-                                        intensity);
+                                        di);
 
   writer.append<ta_vertex_parameter::polygon_type_2>() =
     ta_vertex_parameter::polygon_type_2(polygon_vertex_parameter_control_word(true),
                                         cp.x, cp.y, cp.z,
-                                        intensity);
+                                        ci);
 #endif
 }
 

gen/k_means/python/km.py

@@ -18,7 +18,10 @@ def random_k_points(k, points):
 def distance(point, centroid):
     x0, y0, z0 = point
     x1, y1, z1 = centroid
+    try:
         xd = (x1 - x0) ** 2
+    except OverflowError:
+        print(point, x1, x0)
     yd = (y1 - y0) ** 2
     zd = (z1 - z0) ** 2
     return math.sqrt(xd + yd + zd)
@@ -63,7 +66,7 @@ def k_means_cluster(k, points):
         # Calculate new centroids
         #   (the standard implementation uses the mean of all points in a
         #     cluster to determine the new centroid)
-        print(clusters)
+        #print(clusters)
         new_centroids = [calculate_centroid(cluster) for cluster in clusters]
 
         converged = (new_centroids == centroids)
@@ -77,13 +80,69 @@ def palettize(centroids, point):
     cluster_assignment = argmin(distances_to_each_centroid)
     return cluster_assignment
 
+def pixel_sub(a, b):
+    return (
+        a[0] - b[0],
+        a[1] - b[1],
+        a[2] - b[2]
+    )
+
+def pixel_mul(a, s):
+    return (
+        a[0] * s,
+        a[1] * s,
+        a[2] * s
+    )
+
+def pixel_add(a, b):
+    return (
+        a[0] + b[0],
+        a[1] + b[1],
+        a[2] + b[2]
+    )
+
+def dither(width, height, palette, pixels):
+    pixels = list(pixels)
+
+    def ix(x, y):
+        return y * width + x
+
+    def add_error(x, y, error, scale):
+        if x >= width or y >= height:
+            return
+        old_value = pixels[ix(x, y)]
+        new_value = pixel_add(old_value, pixel_mul(error, scale))
+        pixels[ix(x, y)] = new_value
+
+    for y in range(height):
+        for x in range(width):
+            old_pixel = pixels[y * width + x]
+            new_pixel_ix = palettize(palette, old_pixel)
+            new_pixel = palette[new_pixel_ix]
+
+            pixels[ix(x, y)] = new_pixel_ix
+
+            quant_error = pixel_sub(old_pixel, new_pixel)
+
+            add_error(x + 1, y + 0, quant_error, 7 / 16)
+            add_error(x - 1, y + 1, quant_error, 3 / 16)
+            add_error(x + 0, y + 1, quant_error, 5 / 16)
+            add_error(x + 1, y + 1, quant_error, 1 / 16)
+
+    return pixels
+
 output = sys.argv[2]
 with Image.open(sys.argv[1]) as im:
     pixels = list(im.convert("RGB").getdata())
-    clusters = k_means_cluster(16, pixels)
+    clusters = k_means_cluster(4, pixels)
     palette = list(calculate_centroid(cluster) for cluster in clusters)
-    print(palette)
+    #print(palette)
     palimage = Image.new('P', im.size)
     palimage.putpalette(map(int, list(chain.from_iterable(palette))))
     palimage.putdata([palettize(palette, pixel) for pixel in pixels])
     palimage.save(sys.argv[2])
+
+    ditherimage = Image.new('P', im.size)
+    ditherimage.putpalette(map(int, list(chain.from_iterable(palette))))
+    ditherimage.putdata(dither(*im.size, palette, pixels))
+    ditherimage.save(sys.argv[3])

model/moai/material.h

@@ -0,0 +1,12 @@
+#pragma once
+
+#include <stdint.h>
+
+#include "model/material.h"
+
+enum material {
+  grey,
+};
+
+const struct material_descriptor moai_material[] = {
+};

model/moai/moai.mtl

@@ -0,0 +1,22 @@
+# Blender 4.3.2 MTL File: 'None'
+# www.blender.org
+
+newmtl grey.001
+Ns 249.019638
+Ka 1.000000 1.000000 1.000000
+Kd 0.194617 0.194618 0.194618
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.500000
+d 1.000000
+illum 2
+
+newmtl grey.002
+Ns 250.000000
+Ka 1.000000 1.000000 1.000000
+Kd 0.194617 0.194618 0.194618
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.500000
+d 1.000000
+illum 2

model/moai/moai03.mtl

@@ -0,0 +1,12 @@
+# Blender 4.2.3 LTS MTL File: 'moai03.blend'
+# www.blender.org
+
+newmtl grey
+Ns 250.000000
+Ka 1.000000 1.000000 1.000000
+Kd 0.194617 0.194618 0.194618
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.500000
+d 1.000000
+illum 2

model/moai/moai04.mtl

@@ -0,0 +1,12 @@
+# Blender MTL File: 'None'
+# Material Count: 1
+
+newmtl grey
+Ns 249.019608
+Ka 1.000000 1.000000 1.000000
+Kd 0.194617 0.194618 0.194618
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.500000
+d 1.000000
+illum 2