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Better clean line effect

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This commit is contained in:
Gregor Klevže
2025-11-29 14:28:16 +01:00
parent bc28a61fad
commit 813500878a
3 changed files with 268 additions and 74 deletions
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2
.gitignore vendored
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@ -70,5 +70,7 @@ dist_package/
# Local environment files (if any)
.env
# Ignore local settings file
settings.ini
# End of .gitignore

279
src/gameplay/effects/LineEffect.cpp
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@ -3,82 +3,144 @@
#include <algorithm>
#include <cmath>
#include "audio/Audio.h"
#include "gameplay/core/Game.h"
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
LineEffect::Particle::Particle(float px, float py)
: x(px), y(py), size(6.0f + static_cast<float>(rand()) / RAND_MAX * 12.0f), alpha(1.0f) {
// Random velocity for explosive effect
float angle = static_cast<float>(rand()) / RAND_MAX * 2.0f * M_PI;
float speed = 80.0f + static_cast<float>(rand()) / RAND_MAX * 150.0f;
vx = std::cos(angle) * speed;
vy = std::sin(angle) * speed - 30.0f;
// Random block type for texture
blockType = rand() % 7;
// Fallback colors if texture not available
switch (blockType % 4) {
case 0: color = {255, 140, 30, 255}; break;
case 1: color = {255, 255, 100, 255}; break;
case 2: color = {255, 255, 255, 255}; break;
case 3: color = {255, 100, 100, 255}; break;
}
namespace {
float randRange(float min, float max) {
return min + (static_cast<float>(rand()) / static_cast<float>(RAND_MAX)) * (max - min);
}
}
void LineEffect::Particle::update() {
x += vx * 0.016f;
y += vy * 0.016f;
vy += 250.0f * 0.016f;
vx *= 0.98f;
alpha -= 0.025f; // Slower fade for blocks (longer visibility)
if (alpha < 0.0f) alpha = 0.0f;
if (size > 2.0f) size -= 0.05f;
LineEffect::Particle::Particle(float px, float py, Style particleStyle, SDL_Color tint)
: x(px), y(py), size(0.0f), alpha(1.0f), life(0.0f), lifeSpan(0.0f),
blockType(rand() % 7), color(tint), style(particleStyle) {
float angle = randRange(0.0f, static_cast<float>(M_PI) * 2.0f);
float speed = (style == Style::Shard) ? randRange(140.0f, 260.0f) : randRange(70.0f, 140.0f);
vx = std::cos(angle) * speed;
vy = std::sin(angle) * speed - ((style == Style::Shard) ? randRange(40.0f, 110.0f) : randRange(10.0f, 40.0f));
size = (style == Style::Shard) ? randRange(8.0f, 16.0f) : randRange(5.0f, 10.0f);
lifeSpan = (style == Style::Shard) ? randRange(0.70f, 1.20f) : randRange(1.00f, 1.50f);
}
void LineEffect::Particle::update(float dt) {
life += dt;
if (life >= lifeSpan) {
alpha = 0.0f;
return;
}
const float progress = life / lifeSpan;
x += vx * dt;
y += vy * dt;
float gravity = (style == Style::Shard) ? 520.0f : 240.0f;
vy += gravity * dt;
vx *= (style == Style::Shard) ? 0.96f : 0.985f;
float shrinkRate = (style == Style::Shard) ? 24.0f : 10.0f;
size = std::max(2.0f, size - shrinkRate * dt);
alpha = 1.0f - progress;
}
void LineEffect::Particle::render(SDL_Renderer* renderer, SDL_Texture* blocksTex) {
if (alpha <= 0.0f) return;
if (blocksTex) {
// Render textured block fragment
Uint8 prevA = 255;
SDL_GetTextureAlphaMod(blocksTex, &prevA);
SDL_SetTextureAlphaMod(blocksTex, static_cast<Uint8>(alpha * 255.0f));
const int SPRITE_SIZE = 90;
float srcX = blockType * SPRITE_SIZE + 2;
float srcY = 2;
float srcW = SPRITE_SIZE - 4;
float srcH = SPRITE_SIZE - 4;
SDL_FRect srcRect = {srcX, srcY, srcW, srcH};
SDL_FRect dstRect = {x - size/2, y - size/2, size, size};
SDL_FRect dstRect = {x - size/2.0f, y - size/2.0f, size, size};
SDL_RenderTexture(renderer, blocksTex, &srcRect, &dstRect);
SDL_SetTextureAlphaMod(blocksTex, prevA);
} else {
// Fallback to circle rendering
SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND);
Uint8 adjustedAlpha = static_cast<Uint8>(alpha * 255.0f);
SDL_SetRenderDrawColor(renderer, color.r, color.g, color.b, adjustedAlpha);
for (int i = 0; i < static_cast<int>(size); ++i) {
for (int j = 0; j < static_cast<int>(size); ++j) {
float dx = i - size/2.0f;
float dy = j - size/2.0f;
if (dx*dx + dy*dy <= (size/2.0f)*(size/2.0f)) {
SDL_RenderPoint(renderer, x + dx, y + dy);
float radius = size * 0.5f;
for (int iy = -static_cast<int>(radius); iy <= static_cast<int>(radius); ++iy) {
for (int ix = -static_cast<int>(radius); ix <= static_cast<int>(radius); ++ix) {
float dist2 = float(ix * ix + iy * iy);
if (dist2 <= radius * radius) {
SDL_RenderPoint(renderer, x + ix, y + iy);
}
}
}
}
}
LineEffect::Spark::Spark(float px, float py, SDL_Color tint)
: x(px), y(py), vx(0.0f), vy(0.0f), life(0.0f), maxLife(randRange(0.40f, 0.80f)),
thickness(randRange(1.0f, 2.0f)), color(tint) {
float angle = randRange(0.0f, static_cast<float>(M_PI) * 2.0f);
float speed = randRange(240.0f, 520.0f);
vx = std::cos(angle) * speed;
vy = std::sin(angle) * speed - randRange(80.0f, 150.0f);
}
void LineEffect::Spark::update(float dt) {
life += dt;
x += vx * dt;
y += vy * dt;
vy += 420.0f * dt;
vx *= 0.99f;
}
void LineEffect::Spark::render(SDL_Renderer* renderer) const {
if (life >= maxLife) return;
float progress = life / maxLife;
float alpha = (1.0f - progress) * 255.0f;
if (alpha <= 0.0f) return;
SDL_SetRenderDrawColor(renderer, color.r, color.g, color.b, static_cast<Uint8>(alpha));
float trail = 0.018f * (1.2f - progress) * thickness;
SDL_FPoint tail{ x - vx * trail, y - vy * trail };
SDL_RenderLine(renderer, x, y, tail.x, tail.y);
}
LineEffect::GlowPulse::GlowPulse(float px, float py, float baseR, float maxR, SDL_Color tint)
: x(px), y(py), baseRadius(baseR), maxRadius(maxR), life(0.0f),
maxLife(randRange(0.45f, 0.70f)), color(tint) {
if (color.a == 0) color.a = 200;
}
void LineEffect::GlowPulse::update(float dt) {
life += dt;
if (life > maxLife) life = maxLife;
}
void LineEffect::GlowPulse::render(SDL_Renderer* renderer) const {
if (life >= maxLife) return;
float progress = life / maxLife;
float radius = baseRadius + (maxRadius - baseRadius) * progress;
float baseAlpha = (1.0f - progress) * (color.a / 255.0f);
int intRadius = static_cast<int>(std::ceil(radius));
for (int iy = -intRadius; iy <= intRadius; ++iy) {
float dy = static_cast<float>(iy);
float rowWidth = std::sqrt(std::max(0.0f, radius * radius - dy * dy));
float falloff = std::max(0.0f, 1.0f - std::abs(dy) / radius);
Uint8 alpha = static_cast<Uint8>(baseAlpha * falloff * 255.0f);
if (alpha == 0) continue;
SDL_SetRenderDrawColor(renderer, color.r, color.g, color.b, alpha);
SDL_FRect segment{
x - rowWidth,
y + dy,
rowWidth * 2.0f,
1.4f
};
SDL_RenderFillRect(renderer, &segment);
}
}
LineEffect::LineEffect() : renderer(nullptr), state(AnimationState::IDLE), timer(0.0f),
rng(std::random_device{}()), audioStream(nullptr) {
}
@ -133,6 +195,8 @@ void LineEffect::startLineClear(const std::vector<int>& rows, int gridX, int gri
state = AnimationState::FLASH_WHITE;
timer = 0.0f;
particles.clear();
sparks.clear();
glowPulses.clear();
// Create particles for each clearing row
for (int row : rows) {
@ -144,22 +208,38 @@ void LineEffect::startLineClear(const std::vector<int>& rows, int gridX, int gri
}
void LineEffect::createParticles(int row, int gridX, int gridY, int blockSize) {
// Create particles spread across the row with explosive pattern
int particlesPerRow = 60; // More particles for dramatic explosion effect
for (int i = 0; i < particlesPerRow; ++i) {
// Create particles along the entire row width
float x = gridX + (static_cast<float>(i) / (particlesPerRow - 1)) * (10 * blockSize);
float y = gridY + row * blockSize + blockSize / 2.0f;
// Add some randomness to position
x += (static_cast<float>(rand()) / RAND_MAX - 0.5f) * blockSize * 0.8f;
y += (static_cast<float>(rand()) / RAND_MAX - 0.5f) * blockSize * 0.6f;
particles.emplace_back(x, y);
const float centerY = gridY + row * blockSize + blockSize * 0.5f;
for (int col = 0; col < Game::COLS; ++col) {
float centerX = gridX + col * blockSize + blockSize * 0.5f;
SDL_Color tint = pickFireColor();
spawnGlowPulse(centerX, centerY, static_cast<float>(blockSize), tint);
spawnShardBurst(centerX, centerY, tint);
spawnSparkBurst(centerX, centerY, tint);
}
}
void LineEffect::spawnShardBurst(float x, float y, SDL_Color tint) {
int shardCount = 3 + rand() % 4;
for (int i = 0; i < shardCount; ++i) {
particles.emplace_back(x, y, Particle::Style::Shard, tint);
}
int emberCount = 2 + rand() % 3;
for (int i = 0; i < emberCount; ++i) {
particles.emplace_back(x, y, Particle::Style::Ember, tint);
}
}
void LineEffect::spawnSparkBurst(float x, float y, SDL_Color tint) {
int sparkCount = 4 + rand() % 5;
for (int i = 0; i < sparkCount; ++i) {
sparks.emplace_back(x, y, tint);
}
}
void LineEffect::spawnGlowPulse(float x, float y, float blockSize, SDL_Color tint) {
glowPulses.emplace_back(x, y, blockSize * 0.45f, blockSize * 2.3f, tint);
}
bool LineEffect::update(float deltaTime) {
if (state == AnimationState::IDLE) return true;
@ -174,7 +254,9 @@ bool LineEffect::update(float deltaTime) {
break;
case AnimationState::EXPLODE_BLOCKS:
updateParticles();
updateParticles(deltaTime);
updateSparks(deltaTime);
updateGlowPulses(deltaTime);
if (timer >= EXPLODE_DURATION) {
state = AnimationState::BLOCKS_DROP;
timer = 0.0f;
@ -182,11 +264,15 @@ bool LineEffect::update(float deltaTime) {
break;
case AnimationState::BLOCKS_DROP:
updateParticles();
updateParticles(deltaTime);
updateSparks(deltaTime);
updateGlowPulses(deltaTime);
if (timer >= DROP_DURATION) {
state = AnimationState::IDLE;
clearingRows.clear();
particles.clear();
sparks.clear();
glowPulses.clear();
return true; // Effect complete
}
break;
@ -198,18 +284,34 @@ bool LineEffect::update(float deltaTime) {
return false; // Effect still running
}
void LineEffect::updateParticles() {
// Update all particles
void LineEffect::updateParticles(float dt) {
for (auto& particle : particles) {
particle.update();
particle.update(dt);
}
// Remove dead particles
particles.erase(
std::remove_if(particles.begin(), particles.end(),
[](const Particle& p) { return !p.isAlive(); }),
particles.end()
);
particles.end());
}
void LineEffect::updateSparks(float dt) {
for (auto& spark : sparks) {
spark.update(dt);
}
sparks.erase(
std::remove_if(sparks.begin(), sparks.end(),
[](const Spark& s) { return !s.isAlive(); }),
sparks.end());
}
void LineEffect::updateGlowPulses(float dt) {
for (auto& pulse : glowPulses) {
pulse.update(dt);
}
glowPulses.erase(
std::remove_if(glowPulses.begin(), glowPulses.end(),
[](const GlowPulse& p) { return !p.isAlive(); }),
glowPulses.end());
}
void LineEffect::render(SDL_Renderer* renderer, SDL_Texture* blocksTex, int gridX, int gridY, int blockSize) {
@ -265,11 +367,46 @@ void LineEffect::renderFlash(int gridX, int gridY, int blockSize) {
}
void LineEffect::renderExplosion(SDL_Texture* blocksTex) {
renderGlowPulses();
renderSparks();
renderParticleGlows();
for (auto& particle : particles) {
particle.render(renderer, blocksTex);
}
}
void LineEffect::renderGlowPulses() {
if (glowPulses.empty()) return;
SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_ADD);
for (const auto& pulse : glowPulses) {
pulse.render(renderer);
}
SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND);
}
void LineEffect::renderSparks() {
if (sparks.empty()) return;
SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_ADD);
for (const auto& spark : sparks) {
spark.render(renderer);
}
SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND);
}
void LineEffect::renderParticleGlows() {
if (particles.empty()) return;
SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_ADD);
for (const auto& particle : particles) {
if (particle.alpha <= 0.0f) continue;
float radius = particle.size * 0.6f;
SDL_SetRenderDrawColor(renderer, particle.color.r, particle.color.g, particle.color.b,
static_cast<Uint8>(particle.alpha * 150.0f));
SDL_FRect glowRect{ particle.x - radius, particle.y - radius, radius * 2.0f, radius * 2.0f };
SDL_RenderFillRect(renderer, &glowRect);
}
SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND);
}
void LineEffect::playLineClearSound(int lineCount) {
// Choose appropriate sound based on line count
const std::vector<int16_t>* sample = (lineCount == 4) ? &tetrisSample : &lineClearSample;
@ -278,3 +415,15 @@ void LineEffect::playLineClearSound(int lineCount) {
Audio::instance().playSfx(*sample, 2, 44100, (lineCount == 4) ? 0.9f : 0.7f);
}
}
SDL_Color LineEffect::pickFireColor() const {
static const SDL_Color palette[] = {
{255, 200, 120, 210},
{255, 150, 90, 220},
{255, 100, 160, 200},
{120, 200, 255, 200},
{255, 255, 200, 210}
};
const size_t count = sizeof(palette) / sizeof(palette[0]);
return palette[rand() % count];
}

61
src/gameplay/effects/LineEffect.h
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@ -7,17 +7,49 @@
class LineEffect {
public:
struct Particle {
enum class Style { Shard, Ember };
float x, y;
float vx, vy;
float size;
float alpha;
int blockType; // Added for textured particles
float life;
float lifeSpan;
int blockType;
SDL_Color color;
Particle(float px, float py);
void update();
Style style;
Particle(float px, float py, Style particleStyle, SDL_Color tint);
void update(float dt);
void render(SDL_Renderer* renderer, SDL_Texture* blocksTex);
bool isAlive() const { return alpha > 0.0f; }
bool isAlive() const { return life < lifeSpan && alpha > 0.01f; }
};
struct Spark {
float x, y;
float vx, vy;
float life;
float maxLife;
float thickness;
SDL_Color color;
Spark(float px, float py, SDL_Color tint);
void update(float dt);
void render(SDL_Renderer* renderer) const;
bool isAlive() const { return life < maxLife; }
};
struct GlowPulse {
float x, y;
float baseRadius;
float maxRadius;
float life;
float maxLife;
SDL_Color color;
GlowPulse(float px, float py, float baseR, float maxR, SDL_Color tint);
void update(float dt);
void render(SDL_Renderer* renderer) const;
bool isAlive() const { return life < maxLife; }
};
enum class AnimationState {
@ -51,6 +83,8 @@ private:
float timer{0.0f};
std::vector<int> clearingRows;
std::vector<Particle> particles;
std::vector<Spark> sparks;
std::vector<GlowPulse> glowPulses;
std::mt19937 rng{std::random_device{}()};
// Audio resources
@ -59,14 +93,23 @@ private:
std::vector<int16_t> tetrisSample;
// Animation timing - Flash then immediate explosion effect
static constexpr float FLASH_DURATION = 0.12f; // Very brief white flash
static constexpr float EXPLODE_DURATION = 0.6f; // Longer explosive effect
static constexpr float DROP_DURATION = 0.05f; // Almost instant block drop
static constexpr float FLASH_DURATION = 0.18f; // Slightly longer flash for anticipation
static constexpr float EXPLODE_DURATION = 0.9f; // Extended fireworks time
static constexpr float DROP_DURATION = 0.20f; // Allow lingering sparks before collapse
void createParticles(int row, int gridX, int gridY, int blockSize);
void updateParticles();
void spawnShardBurst(float x, float y, SDL_Color tint);
void spawnSparkBurst(float x, float y, SDL_Color tint);
void spawnGlowPulse(float x, float y, float blockSize, SDL_Color tint);
void updateParticles(float dt);
void updateSparks(float dt);
void updateGlowPulses(float dt);
void renderFlash(int gridX, int gridY, int blockSize);
void renderExplosion(SDL_Texture* blocksTex);
void renderGlowPulses();
void renderSparks();
void renderParticleGlows();
bool loadAudioSample(const std::string& path, std::vector<int16_t>& sample);
void initAudio();
SDL_Color pickFireColor() const;
};