Gitea
commit
191ba495f2
@ -0,0 +1,243 @@ |
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( |
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(sc-init 1024 768) |
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(sc-opt SCREEN_AUTOBLIT 0) |
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(def W 1024) |
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(def H 768) |
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(def MAXITER 50) |
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(lds @cout "Interactive Mandelbrot\n") |
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(lds @cout "----------------------\n") |
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(lds @cout "Navigate using WASD, zoom using Q/E\n") |
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(lds @cout "To get a high-res image, stop interacting for while\n") |
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(sym asciigr r10) |
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(sym mb_x r2) |
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(sym mb_y r3) |
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(sym mb_s r4) |
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(sym mb_row r5) |
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; index into the skip/size table |
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(sym mb_skip_index r6) |
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; size of big pixels |
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(def COL_SKIP 8) |
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(def ROW_SKIP 8) |
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; incrementally renders 1x1, 2x2, 4x4, ... |
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(def MB_SKIP_TABLE_SIZE 80) |
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(def MB_SKIP_REPEAT_INDEX 16) |
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(sym mb_skip_table_x r7) |
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(sym mb_skip_table_y r8) |
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(sym mb_size_table r12) |
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(mkbf mb_skip_table_x ( |
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0 4 0 4 2 6 0 2 4 6 2 6 0 2 4 6 |
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; 8x8 grid |
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1 3 5 7 1 3 5 7 1 3 5 7 1 3 5 7 |
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0 2 4 6 0 2 4 6 0 2 4 6 0 2 4 6 |
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1 3 5 7 1 3 5 7 1 3 5 7 1 3 5 7 |
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; do top left pixels again |
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0 2 4 6 0 2 4 6 0 2 4 6 0 2 4 6 |
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)) |
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(mkbf mb_skip_table_y ( |
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0 0 4 4 0 0 2 2 2 2 4 4 6 6 6 6 |
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; 8x8 grid |
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0 0 0 0 2 2 2 2 4 4 4 4 6 6 6 6 |
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1 1 1 1 3 3 3 3 5 5 5 5 7 7 7 7 |
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1 1 1 1 3 3 3 3 5 5 5 5 7 7 7 7 |
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; do top left pixels again |
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0 0 0 0 2 2 2 2 4 4 4 4 6 6 6 6 |
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)) |
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(mkbf mb_size_table ( |
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8 4 4 4 2 2 2 2 2 2 2 2 2 2 2 2 |
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; 8x8 grid |
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1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 |
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1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 |
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1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 |
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; do top left pixels again |
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1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 |
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)) |
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|
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(ld mb_x 0.0) |
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(ld mb_y 0.0) |
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(ld mb_s 1.0) |
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(sym did_change r14) |
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(sym is_first_render r15) |
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(ld is_first_render 1) |
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; render row |
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; size - pixel size |
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; col - column offset |
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; px - offset x |
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; py - offset y |
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; scale - scaling |
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; row - row position |
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(proc render_row size col px py scale row |
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(sym gradient r9) |
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(mkbf gradient ( |
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0x421e0f 0x19071a 0x09012f 0x040449 0x000764 0x0c2c8a 0x1852b1 0x397dd1 |
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0x86b5e5 0xd3ecf8 0xf1e9bf 0xf8c95f 0xffaa00 0xcc8000 0x995700 0x6a3403)) |
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(sym x r7) |
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(sym y r8) |
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(add y row) |
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(ld x col) |
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(:col) |
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(call pixel x y px py scale) |
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(sub r0 MAXITER 1) |
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(rcmp res0 1 r0 |
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(eq? |
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(mod r0 res0 16) |
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(bfrd r0 @gradient r0) |
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) |
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(else? (ld r0 0)) |
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) |
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(sc-rect x y size size r0) |
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(add x COL_SKIP) |
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(cmp x W) |
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(j.lt :col) |
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(sc-blit) |
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(ret)) |
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(:slp) |
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(sc-poll) |
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; did_change -- did the user interact during this frame? |
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(ld did_change 0) |
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; scaled movement speed in r1 |
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(fdiv r1 0.03 mb_s) |
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; A < |
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(sc-key r0 KEY_A) |
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(j.z :a_not_pressed) |
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(fsub mb_x r1) |
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(ld did_change 1) |
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(:a_not_pressed) |
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; W ^ |
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(sc-key r0 KEY_W) |
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(j.z :w_not_pressed) |
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(fsub mb_y r1) |
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(ld did_change 1) |
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(:w_not_pressed) |
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; S v |
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(sc-key r0 KEY_S) |
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(j.z :s_not_pressed) |
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(fadd mb_y r1) |
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(ld did_change 1) |
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(:s_not_pressed) |
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; D > |
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(sc-key r0 KEY_D) |
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(j.z :d_not_pressed) |
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(fadd mb_x r1) |
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(ld did_change 1) |
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(:d_not_pressed) |
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; Q + |
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(sc-key r0 KEY_Q) |
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(j.z :q_not_pressed) |
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(fmul mb_s 1.01) |
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(ld did_change 1) |
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(:q_not_pressed) |
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; E - |
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(sc-key r0 KEY_E) |
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(j.z :e_not_pressed) |
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(fdiv mb_s 1.01) |
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(ld did_change 1) |
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(:e_not_pressed) |
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(cmp did_change 0) |
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(j.eq :did_not_move) |
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; if something changed... |
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; mark this as a first render and reset col_skip and row_skip |
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(ld is_first_render 1) |
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(ld mb_skip_index 0) |
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(:did_not_move) |
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(sym mb_col_skip r9) |
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(sym mb_row_skip r11) |
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(bfrd mb_col_skip @mb_skip_table_x mb_skip_index) |
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(bfrd mb_row_skip @mb_skip_table_y mb_skip_index) |
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(bfrd r1 @mb_size_table mb_skip_index) |
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; render row mb_row + row skip |
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(ld r0 mb_row) |
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(add r0 mb_row_skip) |
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(call render_row r1 mb_col_skip mb_x mb_y mb_s r0) |
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(cmp mb_row H) |
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(j.ge :render_done) |
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; if mb_row < H |
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(add mb_row ROW_SKIP) |
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(j :render_not_done) |
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(:render_done) |
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; otherwise, this frame is done |
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(ld mb_row 0) |
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(add mb_skip_index 1) |
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(ld is_first_render 0) |
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(cmp mb_skip_index MB_SKIP_TABLE_SIZE) |
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; if skip index is out of bounds, go back to repeating area |
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(j.lt :not_end) |
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(ld mb_skip_index MB_SKIP_REPEAT_INDEX) |
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(:not_end) |
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(:render_not_done) |
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(j :slp) |
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(proc pixel xi yi off_x off_y scale |
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(sym x0 r7) |
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(sym y0 r8) |
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(itf x0 xi) |
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(itf y0 yi) |
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; Scale to the interesting range x -2.5..1 and y -1..1 |
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(itf r0 W) |
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(itf r1 H) |
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(fdiv x0 r0) |
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(fmul x0 3.5) |
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(fsub x0 2.5) |
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(fdiv y0 r1) |
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(fmul y0 2.4) |
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(fsub y0 1.2) |
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(fdiv x0 scale) |
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(fdiv y0 scale) |
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(fadd x0 off_x) |
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(fadd y0 off_y) |
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(sym x r5) |
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(sym y r6) |
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(ld x 0.0) |
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(ld y 0.0) |
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(sym iter r4) |
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(:iter) |
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(cmp iter MAXITER) |
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(j.eq :end) |
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(fmul r0 x x) |
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(fmul r1 y y) |
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(fadd r2 r1) |
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(fcmp r2 4.0) |
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(j.gt :end) |
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(fsub r2 r0 r1) |
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(fadd r2 x0) |
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(fmul r0 x y) |
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(fmul r0 2.0) |
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(fadd r0 y0) |
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(ld y r0) |
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(ld x r2) |
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(inc iter) |
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(j :iter) |
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(:end) |
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(ret iter) |
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) |
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) |
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