initial

.gitignore

@@ -0,0 +1,15 @@
+*.pyc
+__pycache__
+.~*
+*.BIN
+*.bin
+*.elf
+*.d
+*.iso
+*.cdi
+*.o
+*.out
+*.gch
+*.blend1
+*.scramble
+*.FCStd1

Makefile

@@ -0,0 +1,18 @@
+all: src/demo/ballistics.elf
+
+OPT = -O2
+
+MAKEFILE_PATH := $(patsubst %/,%,$(dir $(abspath $(firstword $(MAKEFILE_LIST)))))
+LIB ?= $(MAKEFILE_PATH)/dreamcast
+CFLAGS += -I$(MAKEFILE_PATH)/
+CFLAGS += -I$(MAKEFILE_PATH)/src
+CFLAGS += -I$(MAKEFILE_PATH)/dreamcast
+CFLAGS += -Wno-error=strict-aliasing -fno-strict-aliasing
+CARCH = -m4-single -ml
+
+include dreamcast/base.mk
+include dreamcast/common.mk
+include dreamcast/headers.mk
+include dreamcast/ip.mk
+
+include demo.mk

demo.mk

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+DEMO_OBJ = \
+	$(LIB)/holly/core.o \
+	$(LIB)/holly/region_array.o \
+	$(LIB)/holly/background.o \
+	$(LIB)/holly/ta_fifo_polygon_converter.o \
+	$(LIB)/holly/framebuffer.o \
+	$(LIB)/sh7091/serial.o \
+	$(LIB)/sh7091/c_serial.o \
+	$(LIB)/maple/maple.o \
+	$(LIB)/printf/printf.o \
+	$(LIB)/printf/unparse.o \
+	$(LIB)/printf/parse.o \
+	src/demo/demo.o
+
+demo.elf: LDSCRIPT = $(LIB)/main.lds
+demo.elf: $(START_OBJ) $(DEMO_OBJ) $(LIBGCC)

dreamcast

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+../dreamcast

src/demo/ballistics.cpp

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+#include "physics/particle.hpp"
+
+namespace demo::ballistic {
+
+  enum struct projectile_type {
+    NONE,
+    PISTOL,
+    ARTILLERY,
+    FIREBALL,
+    LASER
+  };
+
+  struct projectile
+  {
+    physics::particle particle;
+    projectile_type type;
+    uint32_t start_time;
+
+    void draw()
+    {
+    }
+  };
+
+  constexpr int max_projectiles = 32;
+  projectile projectiles[max_projectiles];
+  projectile_type current_projectile_type;
+
+  void init()
+  {
+    current_projectile_type = PISTOL;
+
+    for (int i = 0; i < max_projectiles; i++) {
+      projectiles[i].type = projectile_type::NONE;
+    }
+  }
+
+  void fire()
+  {
+    projectile * projectile;
+
+    for (int i = 0; i < max_projectiles; i++) {
+      projectile = &projectiles[i];
+      if (projectile->type == UNUSED)
+        break;
+    }
+
+    if (i >= max_projectiles)
+      return; // too many projectiles
+
+    switch (current_projectile_type) {
+    case projectile_type::PISTOL:
+      projectile->particle.inverse_mass = 1.0f / 2.0f;
+      projectile->particle.velocity = vec3(0.0f, 0.0f, 35.0f);
+      projectile->particle.acceleration = vec3(0.0f, -1.0f, 0.0f);
+      projectile->particle.damping = 0.99f;
+      break;
+    case projectile_type::ARTILLERY:
+      projectile->particle.inverse_mass = 1.0f / 1.0f;
+      projectile->particle.velocity = vec3(0.0f, 30.0f, 40.0f);
+      projectile->particle.acceleration = vec3(0.0f, -20.0f, 0.0f);
+      projectile->particle.damping = 0.99f;
+      break;
+    case projectile_type::FIREBALL:
+      projectile->particle.inverse_mass = 1.0f / 10.0f;
+      projectile->particle.velocity = vec3(0.0f, 0.0f, 10.0f);
+      projectile->particle.acceleration = vec3(0.0f, 0.6f, 0.0f);
+      projectile->particle.damping = 0.9f;
+      break;
+    case projectile_type::LASER:
+      projectile->particle.inverse_mass = 1.0f / 0.1f;
+      projectile->particle.velocity = vec3(0.0f, 0.0f, 100.0f);
+      projectile->particle.acceleration = vec3(0.0f, 0.0f, 0.0f);
+      projectile->particle.damping = 0.99f;
+      break;
+    }
+
+    projectile->particle.position = vec3(0.0f, 1.5f, 0.0f);
+    //projectile->start_time = FIXME;
+    projectile->type = current_projectile_type;
+    //projectile->particle.clear_accumulator(); FIXME
+  }
+
+  void update()
+  {
+    float duration = 1.0f / 60.0f;
+
+    for (int i = 0; i < max_projectiles; i++) {
+      projectile * projectile = &projectiles[i];
+      if (projectile->type == projectile_type::UNUSED)
+        continue;
+
+      projectile->integrate(duration);
+    }
+  }
+
+  void draw()
+  {
+  }
+}

src/demo/demo.cpp

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+#include "assert.h"
+#include "interrupt.hpp"
+//#include "aica/aica.hpp"
+
+#include "holly/holly.hpp"
+#include "holly/ta_bits.hpp"
+#include "holly/region_array.hpp"
+#include "holly/background.hpp"
+#include "holly/core_bits.hpp"
+#include "holly/core.hpp"
+#include "holly/framebuffer.hpp"
+#include "holly/texture_memory_alloc9.hpp"
+#include "holly/ta_fifo_texture_memory_transfer.hpp"
+#include "holly/ta_fifo_polygon_converter.hpp"
+
+#include "ta_parameter_presets.hpp"
+
+#include "printf/printf.h"
+
+void vbr100()
+{
+  serial::string("vbr100\n");
+  interrupt_exception();
+}
+
+void vbr400()
+{
+  serial::string("vbr400\n");
+  interrupt_exception();
+}
+
+static volatile int ta_in_use = 0;
+static volatile int core_in_use = 0;
+static volatile int next_frame = 0;
+static volatile int framebuffer_ix = 0;
+static volatile int next_frame_ix = 0;
+
+static inline void graphics_interrupt(uint32_t istnrm)
+{
+  if (istnrm & istnrm::v_blank_in) {
+    system.ISTNRM = istnrm::v_blank_in;
+
+    next_frame = 1;
+    holly.FB_R_SOF1 = texture_memory_alloc.framebuffer[next_frame_ix].start;
+    holly.FB_R_SOF2 = texture_memory_alloc.framebuffer[next_frame_ix].start;
+  }
+
+  if (istnrm & istnrm::end_of_render_tsp) {
+    system.ISTNRM = istnrm::end_of_render_tsp
+                  | istnrm::end_of_render_isp
+                  | istnrm::end_of_render_video;
+
+    next_frame_ix = framebuffer_ix;
+    framebuffer_ix += 1;
+    if (framebuffer_ix >= 3) framebuffer_ix = 0;
+
+    core_in_use = 0;
+  }
+
+  if (istnrm & istnrm::end_of_transferring_opaque_list) {
+    system.ISTNRM = istnrm::end_of_transferring_opaque_list;
+
+    core_in_use = 1;
+    core_start_render2(texture_memory_alloc.region_array.start,
+                       texture_memory_alloc.isp_tsp_parameters.start,
+                       texture_memory_alloc.background[0].start,
+                       texture_memory_alloc.framebuffer[framebuffer_ix].start,
+                       framebuffer::framebuffer.px_width);
+
+    ta_in_use = 0;
+  }
+}
+
+static bool inside_interrupt = false;
+
+void vbr600()
+{
+  assert(inside_interrupt == false);
+  inside_interrupt = true;
+  uint32_t sr;
+  asm volatile ("stc sr,%0" : "=r" (sr));
+  sr |= sh::sr::imask(15);
+  asm volatile ("ldc %0,sr" : : "r" (sr));
+
+  if (sh7091.CCN.EXPEVT == 0 && sh7091.CCN.INTEVT == 0x320) { // Holly
+    uint32_t istnrm = system.ISTNRM;
+    uint32_t isterr = system.ISTERR;
+
+    if (isterr) {
+      serial::string("isterr: ");
+      serial::integer<uint32_t>(system.ISTERR);
+    }
+
+    graphics_interrupt(istnrm);
+  } else if (sh7091.CCN.EXPEVT == 0 && sh7091.CCN.INTEVT == 0x360) { // AICA
+    //wait(); aica_sound.common.mcire = (1 << 6); // interrupt timer A
+
+    //scene::current_scene->interrupt();
+  } else {
+    serial::string("vbr600\n");
+    interrupt_exception();
+  }
+
+  sr &= ~sh::sr::imask(15);
+  asm volatile ("ldc %0,sr" : : "r" (sr));
+  inside_interrupt = false;
+}
+
+void draw(ta_parameter_writer& writer)
+{
+  global_polygon_intensity(writer, {1.0, 0.0, 0.0});
+
+  quad_type_2(writer,
+              {10, 10, 1},
+              {90, 10, 1},
+              {90, 90, 1},
+              {10, 90, 1},
+              1.0);
+
+  writer.append<ta_global_parameter::end_of_list>() =
+    ta_global_parameter::end_of_list(para_control::para_type::end_of_list);
+}
+
+void main()
+{
+  serial::init(0);
+
+  core_init();
+  framebuffer::scaler_init();
+
+  // read
+  while (spg_status::vsync(holly.SPG_STATUS));
+  while (!spg_status::vsync(holly.SPG_STATUS));
+
+  system.LMMODE0 = 1; // 32-bit address space
+  system.LMMODE1 = 1; // 32-bit address space
+
+  int length = texture_memory_alloc.framebuffer[2].start;
+  ta_fifo_texture_memory_transfer::zeroize(&ta_fifo_texture_memory[0 / 4],
+                                           length,
+                                           0x00c0bebc);
+  ta_fifo_texture_memory_transfer::zeroize(&ta_fifo_texture_memory[length / 4],
+                                           720 * 480 * 2,
+                                           0xc5f7c5f7);
+
+  framebuffer::spg_set_mode_640x480_vga();
+  framebuffer::init(640, 480,
+                    texture_memory_alloc.framebuffer[0].start);
+  core_param_init(texture_memory_alloc.region_array.start,
+                  texture_memory_alloc.isp_tsp_parameters.start,
+                  texture_memory_alloc.background[0].start,
+                  framebuffer::framebuffer.px_width);
+
+  holly.SOFTRESET = softreset::pipeline_soft_reset
+		  | softreset::ta_soft_reset;
+  holly.SOFTRESET = 0;
+
+  uint32_t ta_alloc
+    = 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::_32x4byte;
+
+  struct opb_size opb_size = {
+      .opaque = 32 * 4,
+      .opaque_modifier = 0,
+      .translucent = 0,
+      .translucent_modifier = 0,
+      .punch_through = 0
+  };
+
+
+  background_parameter2(texture_memory_alloc.background[0].start,
+                        0x110012);
+
+  region_array_multipass(framebuffer::framebuffer.tile_width(),
+                         framebuffer::framebuffer.tile_height(),
+                         &opb_size,
+                         1,
+                         texture_memory_alloc.region_array.start,
+                         texture_memory_alloc.object_list.start);
+
+  static uint8_t op_buf[1024 * 1024] __attribute__((aligned(32)));
+  ta_parameter_writer writer(op_buf, (sizeof (op_buf)));
+
+  interrupt_init();
+
+  system.IML6NRM = istnrm::end_of_render_tsp
+                 | istnrm::v_blank_in
+                 | istnrm::end_of_transferring_opaque_list;
+
+  while (1) {
+    writer.offset = 0;
+    draw(writer);
+
+    while (ta_in_use);
+    while (core_in_use);
+    ta_in_use = 1;
+    ta_polygon_converter_init2(texture_memory_alloc.isp_tsp_parameters.start,
+                               texture_memory_alloc.isp_tsp_parameters.end,
+                               texture_memory_alloc.object_list.start,
+                               texture_memory_alloc.object_list.end,
+                               opb_size.total(),
+                               ta_alloc,
+                               framebuffer::framebuffer.tile_width(),
+                               framebuffer::framebuffer.tile_height());
+
+    ta_polygon_converter_writeback(writer.buf, writer.offset);
+    ta_polygon_converter_transfer(writer.buf, writer.offset);
+
+    while (next_frame == 0);
+    next_frame = 0;
+  }
+}

src/demo/graphics.cpp

@@ -0,0 +1 @@
+

src/physics/particle.cpp

@@ -0,0 +1,23 @@
+#include "assert.h"
+#include "particle.hpp"
+
+namespace physics {
+
+  void particle::integrate(float duration)
+  {
+    assert(duration > 0.0f);
+
+    // linear position
+    position += velocity * duration;
+
+    // acceleration from force
+    vec3 acc = acceleration + force_accum * inverse_mass;
+
+    // linear velocity
+    velocity += acc * duration;
+
+    // drag
+    velocity *= damping;
+  }
+
+}

src/physics/particle.hpp

@@ -0,0 +1,19 @@
+#pragma once
+
+#include "math/float_types.hpp"
+
+namespace physics {
+
+  struct particle
+  {
+    vec3 position;
+    vec3 velocity;
+    vec3 acceleration;
+    float damping;
+    float inverse_mass;
+    vec3 force_accum;
+
+    void integrate(float duration);
+  };
+
+}

src/ta_parameter_presets.hpp

@@ -0,0 +1,62 @@
+#pragma once
+
+#include "holly/ta_parameter.hpp"
+#include "holly/ta_vertex_parameter.hpp"
+#include "holly/ta_global_parameter.hpp"
+#include "holly/isp_tsp.hpp"
+
+#include "math/float_types.hpp"
+
+static inline void global_polygon_intensity(ta_parameter_writer& writer,
+                                            const vec3& color)
+{
+  const uint32_t parameter_control_word = para_control::para_type::polygon_or_modifier_volume
+                                        | para_control::list_type::opaque
+                                        | obj_control::col_type::intensity_mode_1
+                                        ;
+
+  const uint32_t isp_tsp_instruction_word = isp_tsp_instruction_word::depth_compare_mode::greater_or_equal
+                                          | isp_tsp_instruction_word::culling_mode::no_culling;
+
+  const uint32_t tsp_instruction_word = tsp_instruction_word::texture_shading_instruction::decal
+                                      | tsp_instruction_word::src_alpha_instr::one
+                                      | tsp_instruction_word::dst_alpha_instr::zero
+                                      | tsp_instruction_word::fog_control::no_fog;
+
+  const uint32_t texture_control_word = 0;
+
+  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,
+                                        1.0f, color.x, color.y, color.z);
+}
+
+static inline void quad_type_2(ta_parameter_writer& writer,
+                               const vec3& ap,
+                               const vec3& bp,
+                               const vec3& cp,
+                               const vec3& dp,
+                               float base_intensity)
+{
+  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,
+                                        base_intensity);
+
+  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,
+                                        base_intensity);
+
+  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,
+                                        base_intensity);
+
+  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,
+                                        base_intensity);
+}