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nds/main.c
Zack Buhman 3459842128 spinning triangle
2024-09-01 04:34:08 -05:00

689 lines
13 KiB
C
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#include "io_registers.h"
#include "bits.h"
#include "bg.h"
#include "palette.h"
#include "obj.h"
#include "oam.h"
#include "res/player.h"
#include "res/player.pal.h"
#include "res/bowser.h"
#include "res/bowser.pal.h"
static inline uint16_t rgb565(const uint8_t * buf)
{
uint8_t r = buf[0] >> 3;
uint8_t g = buf[1] >> 3;
uint8_t g_l = (buf[1] >> 2) & 1;
uint8_t b = buf[2] >> 3;
return (g_l << 15) | (b << 10) | (g << 5) | (r << 0);
}
struct sign_v {
char sign;
uint8_t v;
};
struct sign_v cos_table[360] = {
{0, 255},
{0, 254},
{0, 254},
{0, 254},
{0, 254},
{0, 254},
{0, 253},
{0, 253},
{0, 252},
{0, 251},
{0, 251},
{0, 250},
{0, 249},
{0, 248},
{0, 247},
{0, 246},
{0, 245},
{0, 243},
{0, 242},
{0, 241},
{0, 239},
{0, 238},
{0, 236},
{0, 234},
{0, 232},
{0, 231},
{0, 229},
{0, 227},
{0, 225},
{0, 223},
{0, 220},
{0, 218},
{0, 216},
{0, 213},
{0, 211},
{0, 208},
{0, 206},
{0, 203},
{0, 200},
{0, 198},
{0, 195},
{0, 192},
{0, 189},
{0, 186},
{0, 183},
{0, 180},
{0, 177},
{0, 173},
{0, 170},
{0, 167},
{0, 163},
{0, 160},
{0, 156},
{0, 153},
{0, 149},
{0, 146},
{0, 142},
{0, 138},
{0, 135},
{0, 131},
{0, 127},
{0, 123},
{0, 119},
{0, 115},
{0, 111},
{0, 107},
{0, 103},
{0, 99},
{0, 95},
{0, 91},
{0, 87},
{0, 83},
{0, 78},
{0, 74},
{0, 70},
{0, 65},
{0, 61},
{0, 57},
{0, 53},
{0, 48},
{0, 44},
{0, 39},
{0, 35},
{0, 31},
{0, 26},
{0, 22},
{0, 17},
{0, 13},
{0, 8},
{0, 4},
{0, 0},
{1, 4},
{1, 8},
{1, 13},
{1, 17},
{1, 22},
{1, 26},
{1, 31},
{1, 35},
{1, 39},
{1, 44},
{1, 48},
{1, 53},
{1, 57},
{1, 61},
{1, 65},
{1, 70},
{1, 74},
{1, 78},
{1, 83},
{1, 87},
{1, 91},
{1, 95},
{1, 99},
{1, 103},
{1, 107},
{1, 111},
{1, 115},
{1, 119},
{1, 123},
{1, 127},
{1, 131},
{1, 135},
{1, 138},
{1, 142},
{1, 146},
{1, 149},
{1, 153},
{1, 156},
{1, 160},
{1, 163},
{1, 167},
{1, 170},
{1, 173},
{1, 177},
{1, 180},
{1, 183},
{1, 186},
{1, 189},
{1, 192},
{1, 195},
{1, 198},
{1, 200},
{1, 203},
{1, 206},
{1, 208},
{1, 211},
{1, 213},
{1, 216},
{1, 218},
{1, 220},
{1, 223},
{1, 225},
{1, 227},
{1, 229},
{1, 231},
{1, 232},
{1, 234},
{1, 236},
{1, 238},
{1, 239},
{1, 241},
{1, 242},
{1, 243},
{1, 245},
{1, 246},
{1, 247},
{1, 248},
{1, 249},
{1, 250},
{1, 251},
{1, 251},
{1, 252},
{1, 253},
{1, 253},
{1, 254},
{1, 254},
{1, 254},
{1, 254},
{1, 254},
{1, 255},
{1, 254},
{1, 254},
{1, 254},
{1, 254},
{1, 254},
{1, 253},
{1, 253},
{1, 252},
{1, 251},
{1, 251},
{1, 250},
{1, 249},
{1, 248},
{1, 247},
{1, 246},
{1, 245},
{1, 243},
{1, 242},
{1, 241},
{1, 239},
{1, 238},
{1, 236},
{1, 234},
{1, 232},
{1, 231},
{1, 229},
{1, 227},
{1, 225},
{1, 223},
{1, 220},
{1, 218},
{1, 216},
{1, 213},
{1, 211},
{1, 208},
{1, 206},
{1, 203},
{1, 200},
{1, 198},
{1, 195},
{1, 192},
{1, 189},
{1, 186},
{1, 183},
{1, 180},
{1, 177},
{1, 173},
{1, 170},
{1, 167},
{1, 163},
{1, 160},
{1, 156},
{1, 153},
{1, 149},
{1, 146},
{1, 142},
{1, 138},
{1, 135},
{1, 131},
{1, 127},
{1, 123},
{1, 119},
{1, 115},
{1, 111},
{1, 107},
{1, 103},
{1, 99},
{1, 95},
{1, 91},
{1, 87},
{1, 83},
{1, 78},
{1, 74},
{1, 70},
{1, 65},
{1, 61},
{1, 57},
{1, 53},
{1, 48},
{1, 44},
{1, 39},
{1, 35},
{1, 31},
{1, 26},
{1, 22},
{1, 17},
{1, 13},
{1, 8},
{1, 4},
{1, 0},
{0, 4},
{0, 8},
{0, 13},
{0, 17},
{0, 22},
{0, 26},
{0, 31},
{0, 35},
{0, 39},
{0, 44},
{0, 48},
{0, 53},
{0, 57},
{0, 61},
{0, 65},
{0, 70},
{0, 74},
{0, 78},
{0, 83},
{0, 87},
{0, 91},
{0, 95},
{0, 99},
{0, 103},
{0, 107},
{0, 111},
{0, 115},
{0, 119},
{0, 123},
{0, 127},
{0, 131},
{0, 135},
{0, 138},
{0, 142},
{0, 146},
{0, 149},
{0, 153},
{0, 156},
{0, 160},
{0, 163},
{0, 167},
{0, 170},
{0, 173},
{0, 177},
{0, 180},
{0, 183},
{0, 186},
{0, 189},
{0, 192},
{0, 195},
{0, 198},
{0, 200},
{0, 203},
{0, 206},
{0, 208},
{0, 211},
{0, 213},
{0, 216},
{0, 218},
{0, 220},
{0, 223},
{0, 225},
{0, 227},
{0, 229},
{0, 231},
{0, 232},
{0, 234},
{0, 236},
{0, 238},
{0, 239},
{0, 241},
{0, 242},
{0, 243},
{0, 245},
{0, 246},
{0, 247},
{0, 248},
{0, 249},
{0, 250},
{0, 251},
{0, 251},
{0, 252},
{0, 253},
{0, 253},
{0, 254},
{0, 254},
{0, 254},
{0, 254},
{0, 254}
};
void main()
{
// 2d graphics engine A BG
io_registers.a.VRAMCNT = (1 << 31) | (1 << 24);
io_registers.a.WVRAMCNT = 0;
// 2d graphics engine B OBJ
io_registers.a.VRAM_HI_CNT = (1 << 15) | (0b10 << 8);
io_registers.a.POWCNT = 0
| POWCNT__lcd_output_destination__a_to_upper__b_to_lower
| POWCNT__2d_graphics_engine_b__enable
| POWCNT__geometry_engine__enable
| POWCNT__rendering_engine__enable
| POWCNT__2d_graphics_engine_a__enable
| POWCNT__lcd__enable;
io_registers.a.DISPCNT = 0
| DISPCNT__bg_screen_base_offset(0)
| DISPCNT__bg_character_base_offset(0)
| DISPCNT__display_mode__graphics_display
| DISPCNT__bg0__enable
//| DISPCNT__display_selection_for_bg0__2d_graphics
| DISPCNT__display_selection_for_bg0__3d_graphics
| DISPCNT__bg_mode__text0_text1_text2_text3
;
io_registers.a.BG0CNT = 0
| BG0CNT__screen_size__256x256
| BG0CNT__screen_base_block(31)
| BG0CNT__color_mode__16_color_mode
| BG0CNT__character_base_block(0)
| BG0CNT__priority(0)
;
io_registers.b.DISPCNT = 0
| DISPCNT__display_mode__graphics_display
| DISPCNT__obj__enable
| DISPCNT__character_obj_mapping_mode__1d_mapping
;
uint32_t pal_size = (uint32_t)&_binary_res_player_data_pal_size;
const uint8_t * pal = (const uint8_t *)&_binary_res_player_data_pal_start;
// palette ram
for (int i = 0; i < 15; i++) {
palette_ram.a.bg.palette[0].color[i] = rgb565(&pal[i * 3]);
}
uint32_t b_pal_size = (uint32_t)&_binary_res_bowser_data_pal_size;
const uint8_t * b_pal = (const uint8_t *)&_binary_res_bowser_data_pal_start;
// bowser palette ram
for (int i = 0; i < 16; i++) {
palette_ram.b.obj.palette[0].color[i] = rgb565(&b_pal[i * 3]);
}
const uint8_t * data = (const uint8_t *)&_binary_res_player_data_start;
for (int y = 0; y < 48; y++) {
uint8_t a = data[y * 8 + 7];
uint8_t b = data[y * 8 + 6];
uint8_t c = data[y * 8 + 5];
uint8_t d = data[y * 8 + 4];
uint8_t e = data[y * 8 + 3];
uint8_t f = data[y * 8 + 2];
uint8_t g = data[y * 8 + 1];
uint8_t h = data[y * 8 + 0];
bg_vram.a.character.offset[0].block[0].character[0].u32[y] = 0
| (a << 28)
| (b << 24)
| (c << 20)
| (d << 16)
| (e << 12)
| (f << 8)
| (g << 4)
| (h << 0);
}
for (int i = 0; i < 32 * 32; i++) {
bg_vram.a.screen.offset[0].block[31].u16[i] = 30;
}
bg_vram.a.screen.offset[0].block[31].u16[32 * 0] = 0;
bg_vram.a.screen.offset[0].block[31].u16[32 * 1] = 1;
bg_vram.a.screen.offset[0].block[31].u16[32 * 2] = 2;
bg_vram.a.screen.offset[0].block[31].u16[32 * 0 + 1] = 3;
bg_vram.a.screen.offset[0].block[31].u16[32 * 1 + 1] = 4;
bg_vram.a.screen.offset[0].block[31].u16[32 * 2 + 1] = 5;
const uint8_t * b_data = (const uint8_t *)&_binary_res_bowser_data_start;
for (int c_y = 0; c_y < 8; c_y++) {
for (int c_x = 0; c_x < 8; c_x++) {
for (int y = 0; y < 8; y++) {
int abs_y = c_y * 8 + y;
int abs_x = c_x * 8;
int origin = abs_y * 64 + abs_x;
uint8_t a = b_data[origin + 7];
uint8_t b = b_data[origin + 6];
uint8_t c = b_data[origin + 5];
uint8_t d = b_data[origin + 4];
uint8_t e = b_data[origin + 3];
uint8_t f = b_data[origin + 2];
uint8_t g = b_data[origin + 1];
uint8_t h = b_data[origin + 0];
obj_vram.b.character[c_y * 8 + c_x].u32[y] = 0
| (a << 28)
| (b << 24)
| (c << 20)
| (d << 16)
| (e << 12)
| (f << 8)
| (g << 4)
| (h << 0);
}
}
}
oam.b.obj[0].attr[0] = 0
| OBJ_ATTRIBUTE_0__obj_shape__square
| OBJ_ATTRIBUTE_0__color_mode__16_color_mode
| OBJ_ATTRIBUTE_0__obj_mode__normal
| OBJ_ATTRIBUTE_0__double_size__disable
| OBJ_ATTRIBUTE_0__affine_transformation__enable
//| OBJ_ATTRIBUTE_0__affine_transformation__disable
| OBJ_ATTRIBUTE_0__y_coordinate(15)
;
oam.b.obj[0].attr[1] = 0
| OBJ_ATTRIBUTE_1__obj_size(0b11) // 64x64
| OBJ_ATTRIBUTE_1__x_coordinate(20)
| OBJ_ATTRIBUTE_1__affine_transformation_parameter(0)
;
oam.b.obj[0].attr[2] = 0
| OBJ_ATTRIBUTE_2__display_priority(0)
| OBJ_ATTRIBUTE_2__character_name(0)
;
/*
dx (reference distance in x-direction for same line) =
(1/α)cosθ
dy (reference distance in y-direction for same line) =
- (1/β)sinθ
dmx (reference distance in x-direction for next line) =
(1/α)sinθ
dmy (reference distance in y-direction for next line) =
(1/β)cosθ
*/
/* do 3d */
while (io_registers.a.GXSTAT & GXSTAT__geometry_engine_busy);
// clear matrix stack status
io_registers.a.GXSTAT |= GXSTAT__matrix_stack_status__overflow_or_underflow;
// clear projection matrix stack
int projection_stack_level = GXSTAT__matrix_stack_status__projection_stack_level(io_registers.a.GXSTAT);
if (projection_stack_level) {
io_registers.a.MTX_MODE = MTX_MODE__matrix_mode__projection;
io_registers.a.MTX_POP = MTX_POP__number_of_pops(1);
}
// clear position_and_vector matrix stack
int position_and_vector_stack_level = GXSTAT__matrix_stack_status__position_and_vector_stack_level(io_registers.a.GXSTAT);
if (position_and_vector_stack_level) {
io_registers.a.MTX_MODE = MTX_MODE__matrix_mode__position_and_vector;
io_registers.a.MTX_POP = MTX_POP__number_of_pops(position_and_vector_stack_level);
}
// load identity matrices
io_registers.a.MTX_MODE = MTX_MODE__matrix_mode__projection;
io_registers.a.MTX_IDENTITY = 0;
io_registers.a.MTX_SCALE = (1 << 12);
io_registers.a.MTX_SCALE = (1 << 12);
io_registers.a.MTX_SCALE = (1 << 12);
io_registers.a.MTX_MODE = MTX_MODE__matrix_mode__position;
io_registers.a.MTX_IDENTITY = 0;
io_registers.a.MTX_MODE = MTX_MODE__matrix_mode__position_and_vector;
io_registers.a.MTX_IDENTITY = 0;
io_registers.a.SWAP_BUFFERS = 0
| SWAP_BUFFERS__depth_buffering__z_value
| SWAP_BUFFERS__translucent_polygon_y_sorting__auto_sort;
io_registers.a.DISP3DCNT = 0
| DISP3DCNT__clear_image__disable
| DISP3DCNT__fog_master__disable
| DISP3DCNT__edge_marking__disable
| DISP3DCNT__anti_aliasing__disable
| DISP3DCNT__alpha_blending__disable
| DISP3DCNT__alpha_test__disable
| DISP3DCNT__texture_mapping__disable;
io_registers.a.CLEAR_COLOR = 0
| CLEAR_COLOR__clear_polygon_id(31)
| CLEAR_COLOR__alpha_value(31)
| CLEAR_COLOR__red(10);
io_registers.a.CLEAR_DEPTH = CLEAR_DEPTH__value(0x7fff);
io_registers.a.POLYGON_ATTR = 0
| POLYGON_ATTR__alpha_value(31)
| POLYGON_ATTR__render_front_surface__enable
| POLYGON_ATTR__render_back_surface__enable;
io_registers.a.VIEWPORT = 0
| VIEWPORT__y2(191)
| VIEWPORT__x2(255)
| VIEWPORT__y1(0)
| VIEWPORT__x1(0);
int theta = 0;
while (1) {
struct sign_v cos = cos_table[theta];
int sin_theta = theta + 90;
if (sin_theta >= 360) sin_theta -= 360;
struct sign_v sin = cos_table[sin_theta];
int _cos = cos.sign ? -cos.v : cos.v;
int _sin = sin.sign ? -sin.v : sin.v;
{
int x = -222;
int y = -128;
int x1 = x * _cos + y * _sin;
int y1 = -x * _sin + y * _cos;
io_registers.a.BEGIN_VTXS = BEGIN_VTXS__type__triangle;
io_registers.a.COLOR = (31 << 10); // blue
io_registers.a.VTX_10 = 0
| VTX_10__z_coordinate(1 << 6)
| VTX_10__y_coordinate(y1 >> (3 + 8))
| VTX_10__x_coordinate(x1 >> (3 + 8))
;
}
{
int x = 222;
int y = -128;
int x1 = x * _cos + y * _sin;
int y1 = -x * _sin + y * _cos;
io_registers.a.COLOR = (31 << 5); // green
io_registers.a.VTX_10 = 0
| VTX_10__z_coordinate(1 << 6)
| VTX_10__y_coordinate(y1 >> (3 + 8))
| VTX_10__x_coordinate(x1 >> (3 + 8))
;
}
{
int x = 0 << 8;
int y = 1 << 8;
int x1 = x * _cos + y * _sin;
int y1 = -x * _sin + y * _cos;
io_registers.a.COLOR = (31 << 0); // blue
io_registers.a.VTX_10 = 0
| VTX_10__z_coordinate(1 << 6)
| VTX_10__y_coordinate(y1 >> (3 + 8))
| VTX_10__x_coordinate(x1 >> (3 + 8))
;
}
io_registers.a.END_VTXS = 0;
io_registers.a.SWAP_BUFFERS = 0
| SWAP_BUFFERS__depth_buffering__z_value
| SWAP_BUFFERS__translucent_polygon_y_sorting__auto_sort;
// dx
oam.b.param[0].pa = cos.sign ? cos.v : -cos.v;
// dmx
oam.b.param[0].pb = sin.sign ? sin.v : -sin.v;
// dy
oam.b.param[0].pc = sin.sign ? -sin.v : sin.v;
// dmy
oam.b.param[0].pd = cos.sign ? cos.v : -cos.v;
theta += 1;
if (theta >= 360) {
theta = 0;
}
while (io_registers.a.VCOUNT != 262);
while (io_registers.a.VCOUNT != 0);
}
}
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