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[examples] Fix shaders_ascii_rendering (#5219)

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* Add ascii post processing

* Fix broken characters and add more comments

* Rename example

* Refactored as requested
This commit is contained in:
Maicon Santana
2025-09-30 17:34:06 +01:00
committed by GitHub
parent 0e2e8ce225
commit a553fbd0c7
5 changed files with 125 additions and 79 deletions
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44
examples/shaders/shaders_ascii_rendering.c
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@@ -48,14 +48,14 @@ int main(void)
int fontSizeLoc = GetShaderLocation(shader, "fontSize");
// Set the character size for the ASCII effect
float fontSize = 4.0f;
// Fontsize should be 9 or more
float fontSize = 9.0f;
// Send the updated values to the shader
float resolution[2] = { (float)screenWidth, (float)screenHeight };
SetShaderValue(shader, resolutionLoc, resolution, SHADER_UNIFORM_VEC2);
SetShaderValue(shader, fontSizeLoc, &fontSize, SHADER_UNIFORM_FLOAT);
Vector2 circlePos = (Vector2){40.0f, (float)screenHeight * 0.5f};
Vector2 circlePos = (Vector2){40.0f, (float)screenHeight*0.5f};
float circleSpeed = 1.0f;
// RenderTexture to apply the postprocessing later
@@ -67,37 +67,47 @@ int main(void)
// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
{
// Update
//----------------------------------------------------------------------------------
if (IsKeyPressed(KEY_LEFT) && fontSize > 9.0) fontSize -= 1; // Reduce fontSize
if (IsKeyPressed(KEY_RIGHT) && fontSize < 15.0) fontSize += 1; // Increase fontSize
if (circlePos.x > 200.0f || circlePos.x < 40.0f) circleSpeed *= -1; // Revert speed
circlePos.x += circleSpeed;
if ((circlePos.x > 200.0f) || (circlePos.x < 40.0f)) circleSpeed *= -1;
//----------------------------------------------------------------------------------
// Set fontsize for the shader
SetShaderValue(shader, fontSizeLoc, &fontSize, SHADER_UNIFORM_FLOAT);
// Draw
//----------------------------------------------------------------------------------
// Draw our scene to a render texture first
BeginTextureMode(target);
ClearBackground(WHITE);
ClearBackground(WHITE); // The background of the scene itself
// Samples Using custom shader
DrawTexture(fudesumi, 500, -30, WHITE);
DrawTextureV(raysan, circlePos, WHITE);
EndTextureMode();
BeginDrawing();
ClearBackground(RAYWHITE);
BeginShaderMode(shader);
// Draw the render texture containing scene
// The shader will process every pixel on the screen
DrawTextureRec(target.texture,
(Rectangle){ 0, 0, (float)target.texture.width, (float)-target.texture.height },
(Vector2){ 0, 0 }, WHITE);
// Draw the scene texture (that we rendered earlier) to the screen
// The shader will process every pixel of this texture
DrawTextureRec(target.texture,
(Rectangle){ 0, 0, (float)target.texture.width, (float)-target.texture.height },
(Vector2){ 0, 0 },
WHITE);
EndShaderMode();
DrawRectangle(0, 0, screenWidth, 40, BLACK);
DrawText("Ascii effect", 120, 10, 20, LIGHTGRAY);
DrawText(TextFormat("Ascii effect - FontSize:%2.0f - [Left] -1 [Right] +1 ", fontSize), 120, 10, 20, LIGHTGRAY);
DrawFPS(10, 10);
EndDrawing();