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spinning triangle

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This commit is contained in:
Zack Buhman 2024-09-01 04:30:23 -05:00
parent 76dc15b1c0
commit 3459842128
4 changed files with 168 additions and 43 deletions
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22
bits.h
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@ -178,7 +178,7 @@
#define VTX_XY__y_coordinate(v) (((v) & 0xffff) << 16)
#define VTX_XY__x_coordinate(v) (((v) & 0xffff) << 0)
#define VTX_XZ__z_coordinate(v) (((v) & 0xffff) << 16)
#define VTX_XZ__z_coordinate(v) (((v) & 0xffff) << 0)
#define VTX_XZ__x_coordinate(v) (((v) & 0xffff) << 0)
#define VTX_YZ__z_coordinate(v) (((v) & 0xffff) << 16)
#define VTX_YZ__y_coordinate(v) (((v) & 0xffff) << 0)
#define VTX_DIFF__z_coordinate(v) (((v) & 0x3ff) << 20)
@ -307,17 +307,17 @@
#define GXSTAT__command_fifo_interrupt_condition__disable (0x0 << 30)
#define GXSTAT__command_fifo_interrupt_condition__half_full (0x1 << 30)
#define GXSTAT__command_fifo_interrupt_condition__empty (0x2 << 30)
#define GXSTAT__geometry_engine_busy(v) (((v) >> 27) & 0x1)
#define GXSTAT__fifo_status__empty(v) (((v) >> 26) & 0x1)
#define GXSTAT__fifo_status__less_than_half_full(v) (((v) >> 25) & 0x1)
#define GXSTAT__fifo_status__full(v) (((v) >> 24) & 0x1)
#define GXSTAT__geometry_engine_busy (0x1 << 27)
#define GXSTAT__fifo_status__empty (0x1 << 26)
#define GXSTAT__fifo_status__less_than_half_full (0x1 << 25)
#define GXSTAT__fifo_status__full (0x1 << 24)
#define GXSTAT__command_fifo_count(v) (((v) >> 16) & 0xff)
#define GXSTAT__matrix_stack_status__stack_overflow_or_underflow(v) (((v) >> 15) & 0x1)
#define GXSTAT__matrix_stack_status__stack_busy(v) (((v) >> 14) & 0x1)
#define GXSTAT__matrix_stack_status__projection_matrix_stack_level(v) (((v) >> 13) & 0x1)
#define GXSTAT__matrix_stack_status__position_and_vector_matrix_stack_level(v) (((v) >> 8) & 0x1f)
#define GXSTAT__test_status(v) (((v) >> 1) & 0x1)
#define GXSTAT__test_busy(v) (((v) >> 0) & 0x1)
#define GXSTAT__matrix_stack_status__overflow_or_underflow (0x1 << 15)
#define GXSTAT__matrix_stack_status__busy (0x1 << 14)
#define GXSTAT__matrix_stack_status__projection_stack_level(v) (((v) >> 13) & 0x1)
#define GXSTAT__matrix_stack_status__position_and_vector_stack_level(v) (((v) >> 8) & 0x1f)
#define GXSTAT__test_status (0x1 << 1)
#define GXSTAT__test_busy (0x1 << 0)
#define LISTRAM_COUNT__counter(v) (((v) >> 0) & 0xfff)
#define VTXRAM_COUNT__counter(v) (((v) >> 0) & 0x1fff)
#define OBJ_ATTRIBUTE_0__obj_shape__square (0x0 << 14)

167
main.c
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@ -398,12 +398,21 @@ void main()
// 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__2d_graphics
| DISPCNT__display_selection_for_bg0__3d_graphics
| DISPCNT__bg_mode__text0_text1_text2_text3
;
@ -475,28 +484,28 @@ void main()
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;
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];
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);
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);
}
}
}
@ -533,6 +542,70 @@ void main()
(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];
@ -540,6 +613,58 @@ void main()
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;

22
registers/graphics_engine_bits.csv
View File

@ -202,7 +202,7 @@
"VTX_XY",,"15-0","x_coordinate",,"0xffff",
,,,,,,
"VTX_XZ",,"31-16","z_coordinate",,"0xffff",
"VTX_XZ",,"15-0","z_coordinate",,"0xffff",
"VTX_XZ",,"15-0","x_coordinate",,"0xffff",
,,,,,,
"VTX_YZ",,"31-16","z_coordinate",,"0xffff",
"VTX_YZ",,"15-0","y_coordinate",,"0xffff",
@ -348,17 +348,17 @@
"GXSTAT","command_fifo_interrupt_condition","31-30","disable","0b00",,
"GXSTAT","command_fifo_interrupt_condition","31-30","half_full","0b01",,
"GXSTAT","command_fifo_interrupt_condition","31-30","empty","0b10",,
"GXSTAT",,27,"geometry_engine_busy",,,
"GXSTAT","fifo_status",26,"empty",,,
"GXSTAT","fifo_status",25,"less_than_half_full",,,
"GXSTAT","fifo_status",24,"full",,,
"GXSTAT",,27,"geometry_engine_busy",1,,
"GXSTAT","fifo_status",26,"empty",1,,
"GXSTAT","fifo_status",25,"less_than_half_full",1,,
"GXSTAT","fifo_status",24,"full",1,,
"GXSTAT",,"23-16","command_fifo_count",,,
"GXSTAT","matrix_stack_status",15,"stack_overflow_or_underflow",,,
"GXSTAT","matrix_stack_status",14,"stack_busy",,,
"GXSTAT","matrix_stack_status",13,"projection_matrix_stack_level",,,
"GXSTAT","matrix_stack_status","12-8","position_and_vector_matrix_stack_level",,,
"GXSTAT",,1,"test_status",,,
"GXSTAT",,0,"test_busy",,,
"GXSTAT","matrix_stack_status",15,"overflow_or_underflow",1,,
"GXSTAT","matrix_stack_status",14,"busy",1,,
"GXSTAT","matrix_stack_status",13,"projection_stack_level",,,
"GXSTAT","matrix_stack_status","12-8","position_and_vector_stack_level",,,
"GXSTAT",,1,"test_status",1,,
"GXSTAT",,0,"test_busy",1,,
,,,,,,
"LISTRAM_COUNT",,"11-0","counter",,,
,,,,,,

1 register_name enum_name bits bit_name value mask description
202 VTX_XY 15-0 x_coordinate 0xffff
203
204 VTX_XZ 31-16 z_coordinate 0xffff
205 VTX_XZ 15-0 z_coordinate x_coordinate 0xffff
206
207 VTX_YZ 31-16 z_coordinate 0xffff
208 VTX_YZ 15-0 y_coordinate 0xffff
348 GXSTAT command_fifo_interrupt_condition 31-30 disable 0b00
349 GXSTAT command_fifo_interrupt_condition 31-30 half_full 0b01
350 GXSTAT command_fifo_interrupt_condition 31-30 empty 0b10
351 GXSTAT 27 geometry_engine_busy 1
352 GXSTAT fifo_status 26 empty 1
353 GXSTAT fifo_status 25 less_than_half_full 1
354 GXSTAT fifo_status 24 full 1
355 GXSTAT 23-16 command_fifo_count
356 GXSTAT matrix_stack_status 15 stack_overflow_or_underflow overflow_or_underflow 1
357 GXSTAT matrix_stack_status 14 stack_busy busy 1
358 GXSTAT matrix_stack_status 13 projection_matrix_stack_level projection_stack_level
359 GXSTAT matrix_stack_status 12-8 position_and_vector_matrix_stack_level position_and_vector_stack_level
360 GXSTAT 1 test_status 1
361 GXSTAT 0 test_busy 1
362
363 LISTRAM_COUNT 11-0 counter
364

BIN
registers/graphics_engine_bits.ods
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