<?phpnamespace App\Gfx;use App\Game\Run;use App\Game\Track;use JumPHP\Gl\Mat4;use JumPHP\Renderer\Renderer;/** * The 3D view without WebGL (desktop): the same camera, tiles projected with Mat4::project() and filled * line by line, drawn far to near (painter's order), the ball after the row it is on. */final class SoftwareView{ private const AHEAD = 34; /** @param float[] $viewProj @param array{0: int[], 1: int[], 2: int[]} $sky */ public static function draw(Renderer $r, Run $run, array $viewProj, array $sky): void { [$top, $bottom, $sun] = $sky; [$w, $h] = [$r->getWidth(), $r->getHeight()]; $bands = 18; for ($i = 0; $i < $bands; $i++) { $t = min(1.0, $i / ($bands * 0.6)); $r->fillRect(0, (int)($i * $h / $bands), $w, (int)ceil($h / $bands) + 1, self::mix($top, $bottom, $t)); } $horizon = Mat4::project($viewProj, [0, 0, $run->z + 400], $w, $h); if ($horizon !== null) { $r->fillCircle($w / 2, $horizon[1] - 6, 26, $sun); $r->fillRect(0, (int)$horizon[1], $w, $h, $bottom); } $row = $run->row(); for ($i = $row + self::AHEAD; $i >= $row - 3; $i--) { $fog = max(0.0, min(1.0, ($i - $row - 12) / 22)); self::row($r, $run, $i, $viewProj, $bottom, $fog); if ($i === $row) { self::ball($r, $run, $viewProj); } } } /** @param float[] $vp @param int[] $fogColor */ private static function row(Renderer $r, Run $run, int $row, array $vp, array $fogColor, float $fog): void { $track = $run->track; $zone = Meshes::zone($row); // outer lanes first, the one under the camera last: nearer sides cover farther ones foreach ([0, 4, 1, 3, 2] as $lane) { $h = $track->height($row, $lane); if ($h === null) { continue; } $base = $h > 0 ? $zone['block'] : (($row + $lane) % 2 ? $zone['a'] : $zone['b']); $topColor = self::mix($base, $fogColor, $fog); $sideColor = self::mix(self::scale($base, 0.55), $fogColor, $fog); [$x0, $x1, $z0, $z1, $y0] = [$lane - 2.47, $lane - 1.53, $row + 0.03, $row + 0.97, -0.5]; if (($track->height($row, $lane - 1) ?? -9.0) < $h && $x0 > $run->x * 0.6) { self::fill($r, $vp, [[$x0, $y0, $z0], [$x0, $h, $z0], [$x0, $h, $z1], [$x0, $y0, $z1]], $sideColor); } if (($track->height($row, $lane + 1) ?? -9.0) < $h && $x1 < $run->x * 0.6) { self::fill($r, $vp, [[$x1, $y0, $z0], [$x1, $h, $z0], [$x1, $h, $z1], [$x1, $y0, $z1]], $sideColor); } if (($track->height($row - 1, $lane) ?? -9.0) < $h) { self::fill($r, $vp, [[$x0, $y0, $z0], [$x1, $y0, $z0], [$x1, $h, $z0], [$x0, $h, $z0]], $sideColor); } self::fill($r, $vp, [[$x0, $h, $z0], [$x1, $h, $z0], [$x1, $h, $z1], [$x0, $h, $z1]], $topColor); if ($track->hasGem($row, $lane)) { $p = Mat4::project($vp, [$lane - 2, $h + 0.6 + sin($run->time * 4 + $row) * 0.08, $row + 0.5], $r->getWidth(), $r->getHeight()); $q = Mat4::project($vp, [$lane - 2 + 0.17, $h + 0.6, $row + 0.5], $r->getWidth(), $r->getHeight()); if ($p !== null && $q !== null) { $r->fillCircle($p[0], $p[1], max(1.0, abs($q[0] - $p[0])), self::mix([255, 220, 60], $fogColor, $fog)); } } } // gems over holes for ($lane = 0; $lane < Track::LANES; $lane++) { if ($track->height($row, $lane) === null && $track->hasGem($row, $lane)) { $p = Mat4::project($vp, [$lane - 2, 1.0, $row + 0.5], $r->getWidth(), $r->getHeight()); if ($p !== null) { $r->fillCircle($p[0], $p[1], 2, [255, 220, 60]); } } } } /** @param float[] $vp */ private static function ball(Renderer $r, Run $run, array $vp): void { [$w, $h] = [$r->getWidth(), $r->getHeight()]; $center = [$run->x, $run->y + Run::RADIUS, $run->z]; $p = Mat4::project($vp, $center, $w, $h); $q = Mat4::project($vp, [$run->x + Run::RADIUS, $run->y + Run::RADIUS, $run->z], $w, $h); if ($p === null || $q === null) { return; } $radius = max(2.0, abs($q[0] - $p[0])); $ground = $run->ground(); if ($ground !== null && $run->state === 'run') { $s = Mat4::project($vp, [$run->x, $ground, $run->z], $w, $h); if ($s !== null) { $r->fillRect($s[0] - $radius * 0.9, $s[1] - 1, $radius * 1.8, 2, [0, 0, 0, 110]); } } $r->fillCircle($p[0], $p[1], $radius, [250, 250, 255]); // the red stripe goes round with the roll $c = cos($run->roll); $r->fillCircle($p[0], $p[1] - $c * $radius * 0.45, $radius * (0.35 + 0.25 * abs(sin($run->roll))), [255, 70, 90]); $r->fillCircle($p[0] - $radius * 0.35, $p[1] - $radius * 0.4, max(1.0, $radius * 0.22), [255, 255, 255]); } /** A convex polygon (3D points), filled one pixel row at a time. @param float[] $vp @param float[][] $points @param int[] $color */ private static function fill(Renderer $r, array $vp, array $points, array $color): void { [$w, $h] = [$r->getWidth(), $r->getHeight()]; $pts = []; foreach ($points as $p) { $q = Mat4::project($vp, $p, $w, $h); if ($q === null) { return; } $pts[] = $q; } $ys = array_column($pts, 1); $y0 = max(0, (int)floor(min($ys))); $y1 = min($h - 1, (int)floor(max($ys))); $n = count($pts); for ($y = $y0; $y <= $y1; $y++) { $sy = $y + 0.5; $xa = INF; $xb = -INF; for ($i = 0; $i < $n; $i++) { [$ax, $ay] = $pts[$i]; [$bx, $by] = $pts[($i + 1) % $n]; if (($ay <= $sy && $by >= $sy) || ($by <= $sy && $ay >= $sy)) { $x = $ay == $by ? $ax : $ax + ($sy - $ay) * ($bx - $ax) / ($by - $ay); $xa = min($xa, $x, $ay == $by ? $bx : $x); $xb = max($xb, $x, $ay == $by ? $bx : $x); } } if ($xa <= $xb) { $r->fillRect((int)round($xa), $y, max(1, (int)round($xb) - (int)round($xa)), 1, $color); } elseif ($y0 === $y1) { $r->fillRect((int)round(min(array_column($pts, 0))), $y, 1, 1, $color); } } } /** @param int[] $a @param int[] $b @return int[] */ private static function mix(array $a, array $b, float $t): array { return [(int)($a[0] + ($b[0] - $a[0]) * $t), (int)($a[1] + ($b[1] - $a[1]) * $t), (int)($a[2] + ($b[2] - $a[2]) * $t)]; } /** @param int[] $c @return int[] */ private static function scale(array $c, float $f): array { return [(int)($c[0] * $f), (int)($c[1] * $f), (int)($c[2] * $f)]; }}