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32bitlogo: improve topology, display wireframe and textured

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This commit is contained in:
Zack Buhman 2025-06-26 23:13:45 -05:00
parent 2b96cea9fc
commit 5eaadbb1c9
5 changed files with 2619 additions and 3799 deletions
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BIN
model/32bitlogo/32bitlogo.blend
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6203
model/32bitlogo/model.h
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2
src/framebuffer.cpp
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@ -129,7 +129,7 @@ void core_param_init()
{
uint32_t region_array_start = texture_memory_alloc.region_array.start;
uint32_t isp_tsp_parameters_start = texture_memory_alloc.isp_tsp_parameters.start;
uint32_t background_start = texture_memory_alloc.framebuffer[0].start;
uint32_t background_start = texture_memory_alloc.background[0].start;
holly.REGION_BASE = region_array_start;
holly.PARAM_BASE = isp_tsp_parameters_start;

97
src/scene/logo/scene.cpp
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@ -16,14 +16,48 @@ static vec3 screen_transform(const vec3& v)
return {v.x, v.y, 1.0f / v.z};
}
static void render_mesh(ta_parameter_writer& writer, const mesh& mesh, const mat4x4& trans)
static inline float light_intensity(vec3 n, vec3 l)
{
const int base_color = 0xffffff;
float ambient = 0.2f;
float diffuse_strength = 0.7f;
float n_dot_l = dot(n, l);
float diffuse = 0;
if (n_dot_l > 0)
diffuse = diffuse_strength * n_dot_l * (inverse_length(n) * inverse_length(l));
return ambient + diffuse;
}
vec3 light_vec = (vec3){-1, -1, -1} - (vec3){0, 0, 0};
static void render_mesh(ta_parameter_writer& writer, const mesh& mesh, const mat4x4& trans, bool wireframe)
{
if (wireframe) {
global_polygon_untextured(writer,
para_control::list_type::opaque,
tsp_instruction_word::dst_alpha_instr::zero);
} else {
uint32_t texture_size = tsp_instruction_word::texture_u_size::from_int(8)
| tsp_instruction_word::texture_v_size::from_int(8);
global_polygon_intensity(writer,
para_control::list_type::opaque,
texture::offset::logo,
texture_size,
texture_control_word::pixel_format::_565);
}
vec3 position_cache[mesh.position_length];
for (int i = 0; i < mesh.position_length; i++) {
position_cache[i] = screen_transform(trans * mesh.position[i]);
}
vec3 normal_cache[mesh.polygons_length];
for (int i = 0; i < mesh.polygons_length; i++) {
normal_cache[i] = normal_multiply(trans, mesh.polygon_normal[i]);
}
const int green = 0x00ff00;
for (int i = 0; i < mesh.polygons_length; i++) {
const polygon& p = mesh.polygons[i];
@ -31,16 +65,40 @@ static void render_mesh(ta_parameter_writer& writer, const mesh& mesh, const mat
vec3 ap = position_cache[p.a];
vec3 bp = position_cache[p.b];
vec3 cp = position_cache[p.c];
vec3 dp = position_cache[p.d];
vec2 at = mesh.uv_layers[0][p.uv_index + 0];
vec2 bt = mesh.uv_layers[0][p.uv_index + 1];
vec2 ct = mesh.uv_layers[0][p.uv_index + 2];
if (wireframe) {
line_type_0(writer, ap, bp, green);
line_type_0(writer, bp, cp, green);
if (p.d == -1) {
line_type_0(writer, cp, ap, green);
} else {
line_type_0(writer, cp, dp, green);
line_type_0(writer, dp, ap, green);
}
} else {
vec2 at = mesh.uv_layers[0][p.uv_index + 0];
vec2 bt = mesh.uv_layers[0][p.uv_index + 1];
vec2 ct = mesh.uv_layers[0][p.uv_index + 2];
vec2 dt = mesh.uv_layers[0][p.uv_index + 3];
tri_type_3(writer,
ap, at,
bp, bt,
cp, ct,
base_color);
float intensity = light_intensity(normal_cache[i], light_vec);
if (p.d == -1) {
tri_type_7(writer,
ap, at,
bp, bt,
cp, ct,
intensity);
} else {
quad_type_7(writer,
ap, at,
bp, bt,
cp, ct,
dp, dt,
intensity);
}
}
}
}
@ -68,6 +126,7 @@ namespace scene::logo {
struct keyframe {
float rx;
float ry;
float s;
float duration;
};
@ -75,11 +134,13 @@ namespace scene::logo {
{
.rx = 0,
.ry = 0,
.s = 0.1,
.duration = 1.0 / (5 * 60),
},
{
.rx = pi / 4,
.ry = pi + pi / 4,
.s = 0.7,
.duration = 1.0 / (10 * 60),
},
};
@ -100,25 +161,18 @@ namespace scene::logo {
float drx = b.rx - a.rx;
float dry = b.ry - a.ry;
float drs = b.s - a.s;
return {
.rx = a.rx + drx * ratio,
.ry = a.ry + dry * ratio,
.s = a.s + drs * ratio,
.duration = a.duration,
};
}
void transfer(ta_parameter_writer& writer)
{
uint32_t texture_size = tsp_instruction_word::texture_u_size::from_int(8)
| tsp_instruction_word::texture_v_size::from_int(8);
global_polygon_textured(writer,
para_control::list_type::opaque,
texture::offset::logo,
texture_size,
texture_control_word::pixel_format::_565);
vec3 t = {framebuffer.px_width / 2.f, framebuffer.px_height / 2.f, 0};
float s = framebuffer.px_height / 3.f;
@ -130,11 +184,14 @@ namespace scene::logo {
* translate((vec3){0, 0, 10})
//* rotate_x(pi / 8)
//* rotate_y(pi + pi/8)
* scale(k.s)
* rotate_x(k.rx)
* rotate_y(k.ry)
* scale((vec3){-1, -1, 1});
render_mesh(writer, mesh_logo, trans);
render_mesh(writer, mesh_thirty_two, trans, tick < (6 * 60));
render_mesh(writer, mesh_bit, trans, tick < (7 * 60));
render_mesh(writer, mesh_jam, trans, tick < (8 * 60));
writer.append<ta_global_parameter::end_of_list>() =
ta_global_parameter::end_of_list(para_control::para_type::end_of_list);

116
src/ta_parameter.hpp
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@ -8,6 +8,8 @@
#include "holly/texture_memory_alloc9.hpp"
#include "math/float_types.hpp"
#include "math/math.hpp"
static inline void global_polygon_textured(ta_parameter_writer& writer,
uint32_t list_type,
uint32_t texture_offset,
@ -44,6 +46,40 @@ static inline void global_polygon_textured(ta_parameter_writer& writer,
);
}
static inline void global_polygon_intensity(ta_parameter_writer& writer,
uint32_t list_type,
uint32_t texture_offset,
uint32_t texture_size,
uint32_t pixel_format)
{
const uint32_t parameter_control_word = para_control::para_type::polygon_or_modifier_volume
| list_type
| obj_control::col_type::packed_color
| obj_control::texture
| 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::modulate
| tsp_instruction_word::src_alpha_instr::one
| tsp_instruction_word::dst_alpha_instr::zero
| tsp_instruction_word::fog_control::no_fog
| texture_size;
const uint32_t texture_address = texture_memory_alloc.texture.start + texture_offset;
const uint32_t texture_control_word = pixel_format
| texture_control_word::scan_order::twiddled
| texture_control_word::texture_address(texture_address / 8);
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, 1, 1, 1);
}
static inline void global_polygon_untextured(ta_parameter_writer& writer, uint32_t list_type, uint32_t dst_alpha)
{
@ -109,29 +145,61 @@ static inline void quad_type_3(ta_parameter_writer& writer,
base_color, 0);
}
static inline void tri_type_3(ta_parameter_writer& writer,
static inline void tri_type_7(ta_parameter_writer& writer,
const vec3& ap, const vec2& at,
const vec3& bp, const vec2& bt,
const vec3& cp, const vec2& ct,
int base_color)
float intensity)
{
writer.append<ta_vertex_parameter::polygon_type_3>() =
ta_vertex_parameter::polygon_type_3(polygon_vertex_parameter_control_word(false),
writer.append<ta_vertex_parameter::polygon_type_7>() =
ta_vertex_parameter::polygon_type_7(polygon_vertex_parameter_control_word(false),
ap.x, ap.y, ap.z,
at.x, at.y,
base_color, 0);
intensity, 0);
writer.append<ta_vertex_parameter::polygon_type_3>() =
ta_vertex_parameter::polygon_type_3(polygon_vertex_parameter_control_word(false),
writer.append<ta_vertex_parameter::polygon_type_7>() =
ta_vertex_parameter::polygon_type_7(polygon_vertex_parameter_control_word(false),
bp.x, bp.y, bp.z,
bt.x, bt.y,
base_color, 0);
intensity, 0);
writer.append<ta_vertex_parameter::polygon_type_3>() =
ta_vertex_parameter::polygon_type_3(polygon_vertex_parameter_control_word(true),
writer.append<ta_vertex_parameter::polygon_type_7>() =
ta_vertex_parameter::polygon_type_7(polygon_vertex_parameter_control_word(true),
cp.x, cp.y, cp.z,
ct.x, ct.y,
base_color, 0);
intensity, 0);
}
static inline void quad_type_7(ta_parameter_writer& writer,
const vec3& ap, const vec2& at,
const vec3& bp, const vec2& bt,
const vec3& cp, const vec2& ct,
const vec3& dp, const vec2& dt,
float intensity)
{
writer.append<ta_vertex_parameter::polygon_type_7>() =
ta_vertex_parameter::polygon_type_7(polygon_vertex_parameter_control_word(false),
ap.x, ap.y, ap.z,
at.x, at.y,
intensity, 0);
writer.append<ta_vertex_parameter::polygon_type_7>() =
ta_vertex_parameter::polygon_type_7(polygon_vertex_parameter_control_word(false),
bp.x, bp.y, bp.z,
bt.x, bt.y,
intensity, 0);
writer.append<ta_vertex_parameter::polygon_type_7>() =
ta_vertex_parameter::polygon_type_7(polygon_vertex_parameter_control_word(false),
dp.x, dp.y, dp.z,
dt.x, dt.y,
intensity, 0);
writer.append<ta_vertex_parameter::polygon_type_7>() =
ta_vertex_parameter::polygon_type_7(polygon_vertex_parameter_control_word(true),
cp.x, cp.y, cp.z,
ct.x, ct.y,
intensity, 0);
}
static inline void quad_type_0(ta_parameter_writer& writer,
@ -161,3 +229,29 @@ static inline void quad_type_0(ta_parameter_writer& writer,
cp.x, cp.y, cp.z,
base_color);
}
#define _fsrra(n) (1.0f / (sqrt<float>(n)))
static inline void line_type_0(ta_parameter_writer& writer,
const vec3& p1,
const vec3& p2,
int base_color)
{
float dy = p2.y - p1.y;
float dx = p2.x - p1.x;
float d = _fsrra(dx * dx + dy * dy) * 0.7f;
float dy1 = dy * d;
float dx1 = dx * d;
vec3 ap = { p1.x + dy1, p1.y + -dx1, p1.z };
vec3 bp = { p1.x + -dy1, p1.y + dx1, p1.z };
vec3 cp = { p2.x + -dy1, p2.y + dx1, p2.z };
vec3 dp = { p2.x + dy1, p2.y + -dx1, p2.z };
quad_type_0(writer,
ap,
bp,
cp,
dp,
base_color);
}