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[examples] rewind and forward lines drawing

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This commit is contained in:
Hugo ARNAL 2025-11-22 01:48:42 +01:00
parent a7ce14ee95
commit 14069bf5f6
1 changed files with 44 additions and 10 deletions
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54
examples/shapes/shapes_kaleidoscope.c
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@ -17,6 +17,8 @@
#include "raylib.h" #include "raylib.h"
#define RAYGUI_IMPLEMENTATION
#include "raygui.h"
#include "raymath.h" #include "raymath.h"
#define MAX_DRAW_LINES 8192 #define MAX_DRAW_LINES 8192
@ -47,6 +49,8 @@ int main(void)
int symmetry = 6; int symmetry = 6;
float angle = 360.0f/(float)symmetry; float angle = 360.0f/(float)symmetry;
float thickness = 3.0f; float thickness = 3.0f;
Rectangle backButtonRec = { screenWidth - 55, screenHeight - 30, 25, 25 };
Rectangle nextButtonRec = { screenWidth - 30, screenHeight - 30, 25, 25 };
Vector2 mousePos = { 0 }; Vector2 mousePos = { 0 };
Vector2 prevMousePos = { 0 }; Vector2 prevMousePos = { 0 };
Vector2 scaleVector = { 1.0f, -1.0f }; Vector2 scaleVector = { 1.0f, -1.0f };
@ -58,7 +62,10 @@ int main(void)
camera.rotation = 0.0f; camera.rotation = 0.0f;
camera.zoom = 1.0f; camera.zoom = 1.0f;
int lineCounter = 0; int currentLineCounter = 0;
int totalLineCounter = 0;
int backButtonClicked = false;
int nextButtonClicked = false;
SetTargetFPS(20); SetTargetFPS(20);
//-------------------------------------------------------------------------------------- //--------------------------------------------------------------------------------------
@ -74,24 +81,39 @@ int main(void)
Vector2 lineStart = Vector2Subtract(mousePos, offset); Vector2 lineStart = Vector2Subtract(mousePos, offset);
Vector2 lineEnd = Vector2Subtract(prevMousePos, offset); Vector2 lineEnd = Vector2Subtract(prevMousePos, offset);
if (IsMouseButtonDown(MOUSE_LEFT_BUTTON)) if (
IsMouseButtonDown(MOUSE_LEFT_BUTTON)
&& (CheckCollisionPointRec(mousePos, backButtonRec) == false)
&& (CheckCollisionPointRec(mousePos, nextButtonRec) == false)
)
{ {
for (int s = 0; (s < symmetry) && (lineCounter < (MAX_DRAW_LINES - 1)); s++) for (int s = 0; (s < symmetry) && (totalLineCounter < (MAX_DRAW_LINES - 1)); s++)
{ {
lineStart = Vector2Rotate(lineStart, angle*DEG2RAD); lineStart = Vector2Rotate(lineStart, angle*DEG2RAD);
lineEnd = Vector2Rotate(lineEnd, angle*DEG2RAD); lineEnd = Vector2Rotate(lineEnd, angle*DEG2RAD);
// Store mouse line // Store mouse line
lines[lineCounter].start = lineStart; lines[totalLineCounter].start = lineStart;
lines[lineCounter].end = lineEnd; lines[totalLineCounter].end = lineEnd;
// Store reflective line // Store reflective line
lines[lineCounter + 1].start = Vector2Multiply(lineStart, scaleVector); lines[totalLineCounter + 1].start = Vector2Multiply(lineStart, scaleVector);
lines[lineCounter + 1].end = Vector2Multiply(lineEnd, scaleVector); lines[totalLineCounter + 1].end = Vector2Multiply(lineEnd, scaleVector);
lineCounter += 2; totalLineCounter += 2;
currentLineCounter = totalLineCounter;
} }
} }
if (backButtonClicked && (currentLineCounter > 0))
{
currentLineCounter -= 1;
}
if (nextButtonClicked && (currentLineCounter < MAX_DRAW_LINES) && ((currentLineCounter + 1) <= totalLineCounter))
{
currentLineCounter += 1;
}
//---------------------------------------------------------------------------------- //----------------------------------------------------------------------------------
// Draw // Draw
@ -103,7 +125,7 @@ int main(void)
BeginMode2D(camera); BeginMode2D(camera);
for (int s = 0; s < symmetry; s++) for (int s = 0; s < symmetry; s++)
{ {
for (int i = 0; i < lineCounter; i += 2) for (int i = 0; i < currentLineCounter; i += 2)
{ {
DrawLineEx(lines[i].start, lines[i].end, thickness, BLACK); DrawLineEx(lines[i].start, lines[i].end, thickness, BLACK);
DrawLineEx(lines[i + 1].start, lines[i + 1].end, thickness, BLACK); DrawLineEx(lines[i + 1].start, lines[i + 1].end, thickness, BLACK);
@ -111,7 +133,19 @@ int main(void)
} }
EndMode2D(); EndMode2D();
DrawText(TextFormat("LINES: %i/%i", lineCounter, MAX_DRAW_LINES), 10, screenHeight - 30, 20, MAROON); if ((currentLineCounter - 1) < 0) {
GuiDisable();
}
backButtonClicked = GuiButton(backButtonRec, "<");
GuiEnable();
if ((currentLineCounter + 1) > totalLineCounter) {
GuiDisable();
}
nextButtonClicked = GuiButton(nextButtonRec, ">");
GuiEnable();
DrawText(TextFormat("LINES: %i/%i", currentLineCounter, MAX_DRAW_LINES), 10, screenHeight - 30, 20, MAROON);
DrawFPS(10, 10); DrawFPS(10, 10);
EndDrawing(); EndDrawing();