mirror of
https://github.com/paboyle/Grid.git
synced 2026-05-04 01:14:12 +01:00
Adding Claude related files
This commit is contained in:
Peter Boyle
@@ -0,0 +1,742 @@
|
||||
// TranscriptToVideo.cxx
|
||||
//
|
||||
// Reads a conversation transcript file with [User] / [Claude] turns and
|
||||
// renders it to an AVI using vtkFFMPEGWriter at 1280x720, 10 fps.
|
||||
//
|
||||
// Transcript format:
|
||||
// [USER] Some question or command, possibly spanning
|
||||
// multiple continuation lines.
|
||||
// [ASSISTANT] A response, also possibly
|
||||
// spanning multiple lines.
|
||||
// ...
|
||||
//
|
||||
// Rules:
|
||||
// - A line beginning "[User]" or "[Claude]" starts a new turn.
|
||||
// - Any subsequent non-blank line that does NOT begin with "[" is a
|
||||
// continuation of the previous turn (joined with a single space).
|
||||
// - Blank lines are ignored.
|
||||
//
|
||||
// Usage:
|
||||
// ./TranscriptToVideo <transcript.txt> <output.avi>
|
||||
//
|
||||
// Typewriter speed : 10 chars/sec → 1 frame/char at 10 fps
|
||||
// Pause after turn : 0.5 s → 5 frames
|
||||
// Word-wrap column : 62
|
||||
|
||||
#include <vtkActor.h>
|
||||
#include <vtkActor2D.h>
|
||||
#include <vtkCellArray.h>
|
||||
#include <vtkFFMPEGWriter.h>
|
||||
#include <vtkNamedColors.h>
|
||||
#include <vtkNew.h>
|
||||
#include <vtkPoints.h>
|
||||
#include <vtkPolyData.h>
|
||||
#include <vtkPolyDataMapper2D.h>
|
||||
#include <vtkProperty2D.h>
|
||||
#include <vtkRenderWindow.h>
|
||||
#include <vtkRenderer.h>
|
||||
#include <vtkTextActor.h>
|
||||
#include <vtkTextProperty.h>
|
||||
#include <vtkWindowToImageFilter.h>
|
||||
|
||||
#include <algorithm>
|
||||
#include <fstream>
|
||||
#include <iostream>
|
||||
#include <sstream>
|
||||
#include <string>
|
||||
#include <vector>
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Constants
|
||||
// ---------------------------------------------------------------------------
|
||||
static const int WIDTH = 1280;
|
||||
static const int HEIGHT = 720;
|
||||
static const int FPS = 10;
|
||||
static const int CHARS_PER_FRAME = 5; // 50 chars/sec at 10 fps
|
||||
static const int PAUSE_FRAMES = 3; // 0.3 s
|
||||
static const int WRAP_COLS = 60;
|
||||
static const int MAX_HISTORY = 18; // visible completed lines
|
||||
static const int FONT_SIZE = 18;
|
||||
static const int TITLE_SIZE = 23;
|
||||
static const int LINE_HEIGHT = 28; // pixels between lines
|
||||
static const int MARGIN_LEFT = 48;
|
||||
static const int MARGIN_TOP = 58; // below title bar
|
||||
|
||||
// Colours (R, G, B in 0–1)
|
||||
static const double COL_BG[3] = { 0.04, 0.04, 0.10 }; // near-black navy
|
||||
static const double COL_USER[3] = { 1.00, 0.84, 0.00 }; // gold
|
||||
static const double COL_CLAUDE[3] = { 0.68, 0.85, 0.90 }; // light steel blue
|
||||
static const double COL_TITLE[3] = { 1.00, 1.00, 1.00 }; // white
|
||||
static const double COL_BAR[3] = { 0.30, 0.55, 0.80 }; // progress bar blue
|
||||
static const double COL_LABEL[3] = { 0.65, 0.65, 0.65 }; // dim grey for speaker tag
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Structs
|
||||
// ---------------------------------------------------------------------------
|
||||
enum class Speaker { User, Claude, Caption };
|
||||
|
||||
struct Turn {
|
||||
Speaker speaker;
|
||||
std::string text; // full unwrapped text
|
||||
};
|
||||
|
||||
// A rendered display line (already word-wrapped, tagged with speaker)
|
||||
struct DisplayLine {
|
||||
Speaker speaker;
|
||||
std::string prefix; // "[USER] " or "[ASSISTANT] "
|
||||
std::string body; // wrapped segment
|
||||
bool isFirst; // first line of this turn (prefix printed)
|
||||
bool isBlank; // spacer between turns (no text rendered)
|
||||
bool isCaption; // caption update — body holds text (empty = clear)
|
||||
DisplayLine() : speaker(Speaker::User), isFirst(false), isBlank(false), isCaption(false) {}
|
||||
};
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Replace common multi-byte UTF-8 sequences with ASCII equivalents so that
|
||||
// VTK's font renderer (which only handles ASCII reliably) does not crash.
|
||||
// Any remaining non-ASCII byte is replaced with '?'.
|
||||
// ---------------------------------------------------------------------------
|
||||
static std::string SanitiseASCII(const std::string& s)
|
||||
{
|
||||
std::string out;
|
||||
out.reserve(s.size());
|
||||
const unsigned char* p = (const unsigned char*)s.data();
|
||||
const unsigned char* end = p + s.size();
|
||||
while (p < end) {
|
||||
unsigned char c = *p;
|
||||
if (c < 0x80) {
|
||||
out += (char)c;
|
||||
++p;
|
||||
} else if (c == 0xE2 && (p + 2) < end) {
|
||||
// 3-byte sequence starting 0xE2
|
||||
unsigned char b1 = *(p+1), b2 = *(p+2);
|
||||
// U+2018 ' U+2019 ' (0xE2 0x80 0x98 / 0x99)
|
||||
if (b1 == 0x80 && (b2 == 0x98 || b2 == 0x99)) { out += '\''; p += 3; }
|
||||
// U+201C " U+201D " (0xE2 0x80 0x9C / 0x9D)
|
||||
else if (b1 == 0x80 && (b2 == 0x9C || b2 == 0x9D)) { out += '"'; p += 3; }
|
||||
// U+2013 en-dash (0xE2 0x80 0x93)
|
||||
else if (b1 == 0x80 && b2 == 0x93) { out += '-'; p += 3; }
|
||||
// U+2014 em-dash (0xE2 0x80 0x94)
|
||||
else if (b1 == 0x80 && b2 == 0x94) { out += '-'; p += 3; }
|
||||
// U+2026 ellipsis (0xE2 0x80 0xA6)
|
||||
else if (b1 == 0x80 && b2 == 0xA6) { out += "..."; p += 3; }
|
||||
// U+2192 arrow (0xE2 0x86 0x92)
|
||||
else if (b1 == 0x86 && b2 == 0x92) { out += "->"; p += 3; }
|
||||
// U+00D7 multiplication sign (0xC3 0x97) — caught below, but
|
||||
// U+22xx math operators: replace with '~'
|
||||
else { out += '~'; p += 3; }
|
||||
} else if (c == 0xC3 && (p + 1) < end) {
|
||||
// 2-byte latin-1 supplement
|
||||
unsigned char b1 = *(p+1);
|
||||
if (b1 == 0x97) { out += 'x'; p += 2; } // U+00D7 ×
|
||||
else if (b1 == 0xB7) { out += '/'; p += 2; } // U+00F7 ÷
|
||||
else { out += '?'; p += 2; }
|
||||
} else {
|
||||
// Unknown multi-byte: skip the whole sequence
|
||||
out += '?';
|
||||
++p;
|
||||
while (p < end && (*p & 0xC0) == 0x80) ++p; // skip continuation bytes
|
||||
}
|
||||
}
|
||||
return out;
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Strip markdown emphasis markers (* and `) so they don't appear in the video.
|
||||
// ---------------------------------------------------------------------------
|
||||
static std::string StripMarkdown(const std::string& s)
|
||||
{
|
||||
std::string out;
|
||||
out.reserve(s.size());
|
||||
for (char c : s) {
|
||||
if (c == '*' || c == '`') continue;
|
||||
out += c;
|
||||
}
|
||||
return out;
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Word-wrap: splits `text` into lines of at most maxCols characters.
|
||||
// ---------------------------------------------------------------------------
|
||||
static std::vector<std::string> WrapText(const std::string& text, int maxCols)
|
||||
{
|
||||
std::vector<std::string> lines;
|
||||
std::istringstream words(text);
|
||||
std::string word, line;
|
||||
while (words >> word) {
|
||||
if (!line.empty() && (int)(line.size() + 1 + word.size()) > maxCols) {
|
||||
lines.push_back(line);
|
||||
line = word;
|
||||
} else {
|
||||
if (!line.empty()) line += ' ';
|
||||
line += word;
|
||||
}
|
||||
}
|
||||
if (!line.empty()) lines.push_back(line);
|
||||
if (lines.empty()) lines.push_back("");
|
||||
return lines;
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Parse transcript file into list of Turns.
|
||||
// ---------------------------------------------------------------------------
|
||||
static std::vector<Turn> ParseTranscript(const std::string& path)
|
||||
{
|
||||
std::ifstream f(path);
|
||||
if (!f) {
|
||||
std::cerr << "Cannot open transcript: " << path << "\n";
|
||||
std::exit(1);
|
||||
}
|
||||
|
||||
std::vector<Turn> turns;
|
||||
std::string line;
|
||||
while (std::getline(f, line)) {
|
||||
// Trim trailing CR (Windows files)
|
||||
if (!line.empty() && line.back() == '\r') line.pop_back();
|
||||
|
||||
if (line.empty()) {
|
||||
// Blank line within a dialogue turn = paragraph break.
|
||||
// Caption turns don't support paragraph breaks.
|
||||
if (!turns.empty() && turns.back().speaker != Speaker::Caption) {
|
||||
turns.back().text += '\n'; // '\n' sentinel: expands to blank spacer
|
||||
}
|
||||
continue;
|
||||
}
|
||||
|
||||
if (line.size() >= 6 && line.substr(0, 6) == "[USER]") {
|
||||
Turn t;
|
||||
t.speaker = Speaker::User;
|
||||
t.text = line.substr(6);
|
||||
while (!t.text.empty() && t.text.front() == ' ') t.text.erase(t.text.begin());
|
||||
t.text = SanitiseASCII(t.text);
|
||||
turns.push_back(std::move(t));
|
||||
} else if (line.size() >= 11 && line.substr(0, 11) == "[ASSISTANT]") {
|
||||
Turn t;
|
||||
t.speaker = Speaker::Claude;
|
||||
t.text = line.substr(11);
|
||||
while (!t.text.empty() && t.text.front() == ' ') t.text.erase(t.text.begin());
|
||||
t.text = SanitiseASCII(t.text);
|
||||
turns.push_back(std::move(t));
|
||||
} else if (line.size() >= 9 && line.substr(0, 9) == "[CAPTION]") {
|
||||
Turn t;
|
||||
t.speaker = Speaker::Caption;
|
||||
t.text = line.substr(9);
|
||||
while (!t.text.empty() && t.text.front() == ' ') t.text.erase(t.text.begin());
|
||||
t.text = SanitiseASCII(t.text);
|
||||
turns.push_back(std::move(t));
|
||||
} else if (!turns.empty()) {
|
||||
// Continuation line — strip leading whitespace, preserve as separate line
|
||||
size_t start = line.find_first_not_of(" \t");
|
||||
if (start != std::string::npos) {
|
||||
if (!turns.back().text.empty()) turns.back().text += '\n';
|
||||
turns.back().text += SanitiseASCII(line.substr(start));
|
||||
}
|
||||
}
|
||||
}
|
||||
return turns;
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Expand all Turns into DisplayLines (word-wrapped).
|
||||
// ---------------------------------------------------------------------------
|
||||
static std::vector<DisplayLine> ExpandToDisplayLines(const std::vector<Turn>& turns)
|
||||
{
|
||||
std::vector<DisplayLine> out;
|
||||
// Prefix widths kept equal for alignment
|
||||
const std::string userPfx = "[USER] ";
|
||||
const std::string claudePfx = "[ASSISTANT] ";
|
||||
|
||||
// Track previous non-caption speaker to know when to insert blank spacers
|
||||
Speaker prevSpeaker = Speaker::Caption; // sentinel: no spacer before first real turn
|
||||
for (size_t ti = 0; ti < turns.size(); ++ti) {
|
||||
const Turn& t = turns[ti];
|
||||
|
||||
// Caption turn: emit one special DisplayLine, no spacer, no history entry
|
||||
if (t.speaker == Speaker::Caption) {
|
||||
DisplayLine dl;
|
||||
dl.isCaption = true;
|
||||
dl.speaker = Speaker::Caption;
|
||||
// body: whitespace-only → clear; otherwise wrap lines joined with \n
|
||||
std::string trimmed = t.text;
|
||||
size_t first = trimmed.find_first_not_of(" \t\r\n");
|
||||
if (first == std::string::npos) {
|
||||
dl.body = ""; // signal to clear caption
|
||||
} else {
|
||||
// Wrap to ~90 cols for the wider caption zone
|
||||
auto lines = WrapText(trimmed, 90);
|
||||
for (size_t i = 0; i < lines.size(); ++i) {
|
||||
if (i > 0) dl.body += "\n";
|
||||
dl.body += lines[i];
|
||||
}
|
||||
}
|
||||
out.push_back(dl);
|
||||
continue;
|
||||
}
|
||||
|
||||
// Insert a blank spacer before each new dialogue turn (not before the first)
|
||||
if (prevSpeaker != Speaker::Caption) {
|
||||
DisplayLine blank;
|
||||
blank.isBlank = true;
|
||||
blank.speaker = t.speaker;
|
||||
out.push_back(blank);
|
||||
}
|
||||
prevSpeaker = t.speaker;
|
||||
|
||||
const std::string& pfx = (t.speaker == Speaker::User) ? userPfx : claudePfx;
|
||||
int bodyWidth = WRAP_COLS - (int)pfx.size();
|
||||
if (bodyWidth < 20) bodyWidth = 20;
|
||||
|
||||
// Split the turn text on '\n' to get individual source lines.
|
||||
// Empty source lines become blank spacers (paragraph breaks within a turn).
|
||||
// Non-empty source lines are stripped of markdown markers and word-wrapped.
|
||||
std::vector<std::string> srcLines;
|
||||
{
|
||||
std::string seg;
|
||||
for (char ch : t.text) {
|
||||
if (ch == '\n') { srcLines.push_back(seg); seg.clear(); }
|
||||
else seg += ch;
|
||||
}
|
||||
srcLines.push_back(seg);
|
||||
}
|
||||
|
||||
bool firstOfTurn = true;
|
||||
for (const auto& srcLine : srcLines) {
|
||||
// Strip markdown emphasis markers
|
||||
std::string stripped = StripMarkdown(srcLine);
|
||||
// Trim leading/trailing whitespace
|
||||
size_t f = stripped.find_first_not_of(" \t");
|
||||
if (f == std::string::npos) {
|
||||
// Blank — paragraph break spacer within the turn
|
||||
DisplayLine blank;
|
||||
blank.isBlank = true;
|
||||
blank.speaker = t.speaker;
|
||||
out.push_back(blank);
|
||||
continue;
|
||||
}
|
||||
size_t l = stripped.find_last_not_of(" \t");
|
||||
stripped = stripped.substr(f, l - f + 1);
|
||||
|
||||
auto wrapped = WrapText(stripped, bodyWidth);
|
||||
for (size_t i = 0; i < wrapped.size(); ++i) {
|
||||
DisplayLine dl;
|
||||
dl.speaker = t.speaker;
|
||||
dl.prefix = pfx;
|
||||
dl.body = wrapped[i];
|
||||
dl.isFirst = firstOfTurn && (i == 0);
|
||||
out.push_back(dl);
|
||||
}
|
||||
firstOfTurn = false;
|
||||
}
|
||||
}
|
||||
return out;
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Helper: set actor text to `s`, configure font/colour, position.
|
||||
// ---------------------------------------------------------------------------
|
||||
static void ConfigureTextActor(vtkTextActor* a, int fontSize,
|
||||
double r, double g, double b)
|
||||
{
|
||||
a->GetTextProperty()->SetFontFamilyToCourier();
|
||||
a->GetTextProperty()->SetFontSize(fontSize);
|
||||
a->GetTextProperty()->SetColor(r, g, b);
|
||||
a->GetTextProperty()->SetBold(0);
|
||||
a->GetTextProperty()->SetItalic(0);
|
||||
a->GetTextProperty()->ShadowOff();
|
||||
a->GetTextProperty()->SetJustificationToLeft();
|
||||
a->GetTextProperty()->SetVerticalJustificationToBottom();
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Create a thin horizontal progress bar actor (2D polygon).
|
||||
// Returns the actor; caller adds to renderer.
|
||||
// ---------------------------------------------------------------------------
|
||||
static vtkActor2D* MakeProgressBar(vtkPolyData*& pd, vtkPoints*& pts)
|
||||
{
|
||||
pts = vtkPoints::New();
|
||||
vtkCellArray* cells = vtkCellArray::New();
|
||||
|
||||
// 4 points, updated every frame
|
||||
pts->SetNumberOfPoints(4);
|
||||
pts->SetPoint(0, 0, HEIGHT - 8, 0);
|
||||
pts->SetPoint(1, 0, HEIGHT - 2, 0);
|
||||
pts->SetPoint(2, 100, HEIGHT - 2, 0);
|
||||
pts->SetPoint(3, 100, HEIGHT - 8, 0);
|
||||
|
||||
vtkIdType quad[4] = { 0, 1, 2, 3 };
|
||||
cells->InsertNextCell(4, quad);
|
||||
|
||||
pd = vtkPolyData::New();
|
||||
pd->SetPoints(pts);
|
||||
pd->SetPolys(cells);
|
||||
cells->Delete();
|
||||
|
||||
vtkPolyDataMapper2D* mapper = vtkPolyDataMapper2D::New();
|
||||
mapper->SetInputData(pd);
|
||||
|
||||
vtkActor2D* actor = vtkActor2D::New();
|
||||
actor->SetMapper(mapper);
|
||||
actor->GetProperty()->SetColor(COL_BAR[0], COL_BAR[1], COL_BAR[2]);
|
||||
mapper->Delete();
|
||||
return actor;
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Main
|
||||
// ---------------------------------------------------------------------------
|
||||
int main(int argc, char* argv[])
|
||||
{
|
||||
if (argc < 3) {
|
||||
std::cerr << "Usage: TranscriptToVideo <transcript.txt> <output.avi>\n";
|
||||
return 1;
|
||||
}
|
||||
const std::string transcriptPath = argv[1];
|
||||
const std::string outputPath = argv[2];
|
||||
|
||||
// -----------------------------------------------------------------------
|
||||
// Parse & expand
|
||||
// -----------------------------------------------------------------------
|
||||
auto turns = ParseTranscript(transcriptPath);
|
||||
auto displayLines = ExpandToDisplayLines(turns);
|
||||
const int totalLines = (int)displayLines.size();
|
||||
|
||||
if (totalLines == 0) {
|
||||
std::cerr << "Transcript has no parseable turns.\n";
|
||||
return 1;
|
||||
}
|
||||
|
||||
// Total frames (rough estimate for progress bar denominator)
|
||||
// Each display line: on average ~40 chars + PAUSE_FRAMES
|
||||
// We'll compute exact total below after knowing char counts.
|
||||
int totalFrames = 0;
|
||||
for (const auto& dl : displayLines) {
|
||||
int chars = (int)dl.body.size();
|
||||
totalFrames += (chars + CHARS_PER_FRAME - 1) / CHARS_PER_FRAME + 1 + PAUSE_FRAMES;
|
||||
}
|
||||
|
||||
// -----------------------------------------------------------------------
|
||||
// VTK Setup
|
||||
// -----------------------------------------------------------------------
|
||||
vtkNew<vtkRenderer> ren;
|
||||
vtkNew<vtkRenderWindow> renWin;
|
||||
|
||||
ren->SetBackground(COL_BG[0], COL_BG[1], COL_BG[2]);
|
||||
renWin->AddRenderer(ren);
|
||||
renWin->SetSize(WIDTH, HEIGHT);
|
||||
renWin->SetOffScreenRendering(1);
|
||||
renWin->SetMultiSamples(0);
|
||||
|
||||
// -----------------------------------------------------------------------
|
||||
// Title actor
|
||||
// -----------------------------------------------------------------------
|
||||
vtkNew<vtkTextActor> titleActor;
|
||||
titleActor->SetInput("Transcript");
|
||||
ConfigureTextActor(titleActor, TITLE_SIZE,
|
||||
COL_TITLE[0], COL_TITLE[1], COL_TITLE[2]);
|
||||
titleActor->GetTextProperty()->SetBold(1);
|
||||
titleActor->GetTextProperty()->SetJustificationToCentered();
|
||||
titleActor->SetDisplayPosition(WIDTH / 2, HEIGHT - 36);
|
||||
ren->AddActor2D(titleActor);
|
||||
|
||||
// Thin separator line below title (drawn as a narrow quad)
|
||||
{
|
||||
vtkPoints* lpts = vtkPoints::New();
|
||||
vtkCellArray* lcell = vtkCellArray::New();
|
||||
lpts->InsertNextPoint(0, HEIGHT - 44, 0);
|
||||
lpts->InsertNextPoint(WIDTH, HEIGHT - 44, 0);
|
||||
lpts->InsertNextPoint(WIDTH, HEIGHT - 42, 0);
|
||||
lpts->InsertNextPoint(0, HEIGHT - 42, 0);
|
||||
vtkIdType q[4] = {0,1,2,3};
|
||||
lcell->InsertNextCell(4, q);
|
||||
vtkPolyData* lpd = vtkPolyData::New();
|
||||
lpd->SetPoints(lpts);
|
||||
lpd->SetPolys(lcell);
|
||||
vtkPolyDataMapper2D* lmap = vtkPolyDataMapper2D::New();
|
||||
lmap->SetInputData(lpd);
|
||||
vtkActor2D* lineActor = vtkActor2D::New();
|
||||
lineActor->SetMapper(lmap);
|
||||
lineActor->GetProperty()->SetColor(0.3, 0.3, 0.5);
|
||||
ren->AddActor2D(lineActor);
|
||||
lpts->Delete(); lcell->Delete(); lpd->Delete();
|
||||
lmap->Delete(); lineActor->Delete();
|
||||
}
|
||||
|
||||
// -----------------------------------------------------------------------
|
||||
// History text actors (MAX_HISTORY lines, reused with shifting content)
|
||||
// -----------------------------------------------------------------------
|
||||
std::vector<vtkTextActor*> histActors(MAX_HISTORY);
|
||||
for (int i = 0; i < MAX_HISTORY; ++i) {
|
||||
histActors[i] = vtkTextActor::New();
|
||||
histActors[i]->SetInput("");
|
||||
ConfigureTextActor(histActors[i], FONT_SIZE, 0.5, 0.5, 0.5);
|
||||
// Position: bottom of history area = just above current-line area
|
||||
int y = MARGIN_TOP + (MAX_HISTORY - 1 - i) * LINE_HEIGHT;
|
||||
histActors[i]->SetDisplayPosition(MARGIN_LEFT, HEIGHT - y);
|
||||
ren->AddActor2D(histActors[i]);
|
||||
}
|
||||
|
||||
// Current (actively typing) line actor — two actors: prefix + body
|
||||
vtkNew<vtkTextActor> curPfxActor; // "[User] " in dim colour
|
||||
vtkNew<vtkTextActor> curBodyActor; // body text in vivid colour
|
||||
vtkNew<vtkTextActor> cursorActor; // blinking block
|
||||
|
||||
ConfigureTextActor(curPfxActor, FONT_SIZE, COL_LABEL[0], COL_LABEL[1], COL_LABEL[2]);
|
||||
ConfigureTextActor(curBodyActor, FONT_SIZE, 1, 1, 1); // will be overridden per turn
|
||||
ConfigureTextActor(cursorActor, FONT_SIZE, 1, 1, 1);
|
||||
|
||||
cursorActor->SetInput("|");
|
||||
|
||||
int curLineY = HEIGHT - (MARGIN_TOP + MAX_HISTORY * LINE_HEIGHT);
|
||||
// Place current line below history
|
||||
curPfxActor->SetDisplayPosition(MARGIN_LEFT, curLineY);
|
||||
ren->AddActor2D(curPfxActor);
|
||||
ren->AddActor2D(curBodyActor);
|
||||
ren->AddActor2D(cursorActor);
|
||||
|
||||
// -----------------------------------------------------------------------
|
||||
// Progress bar
|
||||
// -----------------------------------------------------------------------
|
||||
vtkPolyData* barPD = nullptr;
|
||||
vtkPoints* barPts = nullptr;
|
||||
vtkActor2D* barActor = MakeProgressBar(barPD, barPts);
|
||||
ren->AddActor2D(barActor);
|
||||
|
||||
// Progress label
|
||||
vtkNew<vtkTextActor> progLabelActor;
|
||||
progLabelActor->SetInput("");
|
||||
ConfigureTextActor(progLabelActor, 13,
|
||||
COL_LABEL[0], COL_LABEL[1], COL_LABEL[2]);
|
||||
progLabelActor->SetDisplayPosition(MARGIN_LEFT, 12);
|
||||
ren->AddActor2D(progLabelActor);
|
||||
|
||||
// -----------------------------------------------------------------------
|
||||
// Caption actor — bottom-centre, Arial, white, initially hidden
|
||||
// -----------------------------------------------------------------------
|
||||
vtkNew<vtkTextActor> captionActor;
|
||||
captionActor->SetInput("");
|
||||
captionActor->GetTextProperty()->SetFontFamilyToArial();
|
||||
captionActor->GetTextProperty()->SetFontSize(20);
|
||||
captionActor->GetTextProperty()->SetColor(1.0, 1.0, 1.0);
|
||||
captionActor->GetTextProperty()->SetBold(0);
|
||||
captionActor->GetTextProperty()->SetItalic(1);
|
||||
captionActor->GetTextProperty()->ShadowOn();
|
||||
captionActor->GetTextProperty()->SetShadowOffset(1, -1);
|
||||
captionActor->GetTextProperty()->SetJustificationToCentered();
|
||||
captionActor->GetTextProperty()->SetVerticalJustificationToBottom();
|
||||
// Position: centred horizontally, in the gap between typing line and progress label
|
||||
captionActor->SetDisplayPosition(WIDTH / 2, 32);
|
||||
ren->AddActor2D(captionActor);
|
||||
|
||||
// -----------------------------------------------------------------------
|
||||
// FFMPEG writer
|
||||
// -----------------------------------------------------------------------
|
||||
vtkNew<vtkWindowToImageFilter> w2i;
|
||||
w2i->SetInput(renWin);
|
||||
w2i->SetScale(1);
|
||||
w2i->ReadFrontBufferOff();
|
||||
|
||||
vtkNew<vtkFFMPEGWriter> writer;
|
||||
writer->SetInputConnection(w2i->GetOutputPort());
|
||||
writer->SetFileName(outputPath.c_str());
|
||||
writer->SetRate(FPS);
|
||||
writer->SetBitRate(4000);
|
||||
writer->SetBitRateTolerance(400);
|
||||
writer->Start();
|
||||
|
||||
// -----------------------------------------------------------------------
|
||||
// Helper: measure pixel width of a string in the current font
|
||||
// (approximate: Courier is monospace, so width ≈ chars × charWidth)
|
||||
// At font size 17 in Courier, one character ≈ 10.2px wide.
|
||||
// -----------------------------------------------------------------------
|
||||
const double CHAR_PX = 10.2;
|
||||
|
||||
auto bodyX = [&](const std::string& pfx) -> int {
|
||||
return MARGIN_LEFT + (int)(pfx.size() * CHAR_PX);
|
||||
};
|
||||
|
||||
// -----------------------------------------------------------------------
|
||||
// Render one frame
|
||||
// -----------------------------------------------------------------------
|
||||
int frameCount = 0;
|
||||
auto renderFrame = [&]() {
|
||||
renWin->Render();
|
||||
w2i->Modified();
|
||||
writer->Write();
|
||||
++frameCount;
|
||||
};
|
||||
|
||||
// -----------------------------------------------------------------------
|
||||
// History ring — holds completed display lines (most-recent last)
|
||||
// -----------------------------------------------------------------------
|
||||
std::vector<DisplayLine> history;
|
||||
|
||||
auto refreshHistory = [&]() {
|
||||
// slot 0 = bottom row (newest), slot MAX_HISTORY-1 = top row (oldest).
|
||||
// Brightness fades linearly from 0.85 (slot 0) to 0.20 (slot MAX-1).
|
||||
// Blank spacer lines show as empty strings.
|
||||
// The [USER]/[ASSISTANT] prefix stays at a fixed bright level so the
|
||||
// speaker is always identifiable even in dim history.
|
||||
int n = (int)history.size();
|
||||
for (int slot = 0; slot < MAX_HISTORY; ++slot) {
|
||||
int idx = n - 1 - slot; // slot 0 → newest, slot MAX-1 → oldest
|
||||
if (idx < 0) {
|
||||
histActors[slot]->SetInput("");
|
||||
continue;
|
||||
}
|
||||
const auto& hl = history[idx];
|
||||
if (hl.isBlank) {
|
||||
histActors[slot]->SetInput("");
|
||||
continue;
|
||||
}
|
||||
|
||||
// Graduated brightness: bright near bottom, dim near top
|
||||
double bodyBright = 0.20 + 0.65 * (1.0 - (double)slot / (MAX_HISTORY - 1));
|
||||
|
||||
const double* col = (hl.speaker == Speaker::User) ? COL_USER : COL_CLAUDE;
|
||||
|
||||
if (hl.isFirst) {
|
||||
// Prefix stays vivid; body fades
|
||||
// We render prefix + body as one string but colour the whole line
|
||||
// at body brightness — a compromise since VTK TextActor is single-colour.
|
||||
// Use a slightly higher floor for the prefix line so the tag is readable.
|
||||
double pfxBright = std::min(1.0, bodyBright + 0.25);
|
||||
std::string txt = hl.prefix + hl.body;
|
||||
histActors[slot]->SetInput(txt.c_str());
|
||||
histActors[slot]->GetTextProperty()->SetColor(
|
||||
col[0] * pfxBright, col[1] * pfxBright, col[2] * pfxBright);
|
||||
} else {
|
||||
std::string txt = std::string(hl.prefix.size(), ' ') + hl.body;
|
||||
histActors[slot]->SetInput(txt.c_str());
|
||||
histActors[slot]->GetTextProperty()->SetColor(
|
||||
col[0] * bodyBright, col[1] * bodyBright, col[2] * bodyBright);
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
// -----------------------------------------------------------------------
|
||||
// Main animation loop
|
||||
// -----------------------------------------------------------------------
|
||||
int dlIdx = 0; // index into displayLines
|
||||
|
||||
// Count total turns to feed into progress label
|
||||
// (display line index → turn index: count isFirst lines)
|
||||
int totalTurns = 0;
|
||||
for (const auto& dl : displayLines) if (dl.isFirst) ++totalTurns;
|
||||
int turnsSeen = 0;
|
||||
|
||||
for (int li = 0; li < totalLines; ++li) {
|
||||
const DisplayLine& dl = displayLines[li];
|
||||
|
||||
// Caption update: swap the bottom caption, no history, no typewriter
|
||||
if (dl.isCaption) {
|
||||
captionActor->SetInput(dl.body.c_str());
|
||||
renderFrame();
|
||||
continue;
|
||||
}
|
||||
|
||||
// Blank spacer: push to history silently with no typewriter frames
|
||||
if (dl.isBlank) {
|
||||
history.push_back(dl);
|
||||
refreshHistory();
|
||||
continue;
|
||||
}
|
||||
|
||||
// Vivid colour for current speaker
|
||||
double cr, cg, cb;
|
||||
if (dl.speaker == Speaker::User) {
|
||||
cr = COL_USER[0]; cg = COL_USER[1]; cb = COL_USER[2];
|
||||
} else {
|
||||
cr = COL_CLAUDE[0]; cg = COL_CLAUDE[1]; cb = COL_CLAUDE[2];
|
||||
}
|
||||
curBodyActor->GetTextProperty()->SetColor(cr, cg, cb);
|
||||
cursorActor->GetTextProperty()->SetColor(cr, cg, cb);
|
||||
|
||||
// Prefix: vivid speaker colour for first line, indent for continuation
|
||||
if (dl.isFirst) {
|
||||
curPfxActor->SetInput(dl.prefix.c_str());
|
||||
curPfxActor->GetTextProperty()->SetColor(cr, cg, cb);
|
||||
} else {
|
||||
curPfxActor->SetInput(std::string(dl.prefix.size(), ' ').c_str());
|
||||
curPfxActor->GetTextProperty()->SetColor(0, 0, 0);
|
||||
}
|
||||
|
||||
int bx = bodyX(dl.prefix);
|
||||
curBodyActor->SetDisplayPosition(bx, curLineY);
|
||||
cursorActor->SetDisplayPosition(bx, curLineY);
|
||||
|
||||
if (dl.isFirst) ++turnsSeen;
|
||||
|
||||
// Update progress label
|
||||
{
|
||||
char buf[64];
|
||||
std::snprintf(buf, sizeof(buf), "Turn %d / %d", turnsSeen, totalTurns);
|
||||
progLabelActor->SetInput(buf);
|
||||
}
|
||||
|
||||
// Update progress bar width
|
||||
{
|
||||
double frac = (totalFrames > 0) ? (double)frameCount / totalFrames : 0.0;
|
||||
double barW = frac * (WIDTH - 2 * MARGIN_LEFT);
|
||||
barPts->SetPoint(0, MARGIN_LEFT, HEIGHT - 8, 0);
|
||||
barPts->SetPoint(1, MARGIN_LEFT, HEIGHT - 2, 0);
|
||||
barPts->SetPoint(2, MARGIN_LEFT + barW, HEIGHT - 2, 0);
|
||||
barPts->SetPoint(3, MARGIN_LEFT + barW, HEIGHT - 8, 0);
|
||||
barPts->Modified();
|
||||
barPD->Modified();
|
||||
}
|
||||
|
||||
// Typewriter: reveal CHARS_PER_FRAME characters per rendered frame.
|
||||
// Always render the fully-complete state last.
|
||||
const std::string& body = dl.body;
|
||||
int ci = 0;
|
||||
while (true) {
|
||||
curBodyActor->SetInput(body.substr(0, ci).c_str());
|
||||
double cx = bx + ci * CHAR_PX;
|
||||
cursorActor->SetDisplayPosition((int)cx, curLineY);
|
||||
cursorActor->SetVisibility((frameCount % 2 == 0) ? 1 : 0);
|
||||
renderFrame();
|
||||
if (ci >= (int)body.size()) break;
|
||||
ci = std::min(ci + CHARS_PER_FRAME, (int)body.size());
|
||||
}
|
||||
|
||||
// Line is complete — move it to history
|
||||
history.push_back(dl);
|
||||
refreshHistory();
|
||||
|
||||
// Clear current line display
|
||||
curPfxActor->SetInput("");
|
||||
curBodyActor->SetInput("");
|
||||
cursorActor->SetVisibility(0);
|
||||
|
||||
// Pause frames
|
||||
for (int p = 0; p < PAUSE_FRAMES; ++p) {
|
||||
// Update progress bar
|
||||
{
|
||||
double frac = (totalFrames > 0) ? (double)frameCount / totalFrames : 0.0;
|
||||
double barW = frac * (WIDTH - 2 * MARGIN_LEFT);
|
||||
barPts->SetPoint(0, MARGIN_LEFT, HEIGHT - 8, 0);
|
||||
barPts->SetPoint(1, MARGIN_LEFT, HEIGHT - 2, 0);
|
||||
barPts->SetPoint(2, MARGIN_LEFT + barW, HEIGHT - 2, 0);
|
||||
barPts->SetPoint(3, MARGIN_LEFT + barW, HEIGHT - 8, 0);
|
||||
barPts->Modified();
|
||||
barPD->Modified();
|
||||
}
|
||||
renderFrame();
|
||||
}
|
||||
}
|
||||
|
||||
// -----------------------------------------------------------------------
|
||||
// Finish
|
||||
// -----------------------------------------------------------------------
|
||||
writer->End();
|
||||
|
||||
// Tidy up manual ref-counted objects
|
||||
barActor->Delete();
|
||||
barPD->Delete();
|
||||
barPts->Delete();
|
||||
for (auto* a : histActors) a->Delete();
|
||||
|
||||
std::cerr << "Wrote " << frameCount << " frames ("
|
||||
<< frameCount / FPS << " s) to " << outputPath << "\n";
|
||||
return 0;
|
||||
}
|
||||
Reference in New Issue
Block a user