Added sparks

src/Character.cpp

@@ -1,6 +1,7 @@
 #include "Character.h"
 #include <cmath>
 #include <iostream>
+#include <random>
 #include "GameConstants.h"
 #include "Environment.h"
 
@@ -268,6 +269,10 @@ void Character::update(int64_t deltaMs) {
 
     
 
+    if (hitSparkEmitter.isConfigured()) {
+        hitSparkEmitter.update(static_cast<float>(deltaMs));
+    }
+
     auto it = animations.find(currentState);
     if (it == animations.end()) return;
 
@@ -304,13 +309,22 @@ void Character::update(int64_t deltaMs) {
            showWeapon = false;
     }
 
+    auto attackDirectionToTarget = [this]() {
+        Eigen::Vector3f dir = attackTarget->position - position;
+        dir.y() = 0.f;
+        float n = dir.norm();
+        if (n > 1e-3f) dir /= n;
+        else dir = Eigen::Vector3f::Zero();
+        return dir;
+    };
+
     if (isPlayer)
     {
         if (prevFrame == 18 && static_cast<int>(anim.currentFrame) != 18 && (currentState == AnimationState::ACTION_ATTACK || currentState == AnimationState::ACTION_ATTACK_2))
         {
             if (attackTarget != nullptr)
             {
-                attackTarget->applyDamage(10.f);
+                attackTarget->applyDamage(10.f, attackDirectionToTarget());
             }
         }
     }
@@ -320,7 +334,7 @@ void Character::update(int64_t deltaMs) {
         {
             if (attackTarget != nullptr)
             {
-                attackTarget->applyDamage(10.f);
+                attackTarget->applyDamage(10.f, attackDirectionToTarget());
             }
         }
     }
@@ -365,6 +379,11 @@ void Character::update(int64_t deltaMs) {
 }
 
 void Character::draw(Renderer& renderer) {
+    // Sparks are world-space billboards — render under the caller's camera matrices.
+    if (hitSparkEmitter.isConfigured() && hitSparkEmitter.getActiveParticleCount() > 0) {
+        hitSparkEmitter.draw(renderer, 1.0f, Environment::width, Environment::height, false);
+    }
+
     if (!isPlayer && hp <= 0)
     {
         return;
@@ -624,6 +643,11 @@ void Character::drawShadowDepthGpuSkinning(Renderer& renderer) {
 // ==================== Main pass with shadows ====================
 
 void Character::drawWithShadow(Renderer& renderer, const Eigen::Matrix4f& lightFromCamera, GLuint shadowMapTex, const Eigen::Vector3f& lightDirCamera) {
+    // Sparks are world-space billboards — render under the caller's camera matrices.
+    if (hitSparkEmitter.isConfigured() && hitSparkEmitter.getActiveParticleCount() > 0) {
+        hitSparkEmitter.draw(renderer, 1.0f, Environment::width, Environment::height, false);
+    }
+
     if (!isPlayer && hp <= 0)
     {
         return;
@@ -755,10 +779,45 @@ void Character::drawGpuSkinningWithShadow(Renderer& renderer, const Eigen::Matri
     CheckGlError(__FILE__, __LINE__);
 }
 
-void Character::applyDamage(float damageAmount)
+void Character::setupHitSparks(std::shared_ptr<Texture> sparkTexture)
+{
+    hitSparkEmitter.setTexture(sparkTexture);
+    hitSparkEmitter.setShaderProgramName("spark");
+    hitSparkEmitter.setMaxParticles(64);
+    hitSparkEmitter.setParticleSize(0.08f);
+    hitSparkEmitter.setBiasX(0.0f);
+    hitSparkEmitter.setEmissionRate(1.0e9f); // effectively disables auto-emission
+    hitSparkEmitter.setSpeedRange(2.0f, 4.0f);
+    hitSparkEmitter.setZSpeedRange(0.5f, 2.0f);
+    hitSparkEmitter.setScaleRange(0.8f, 1.2f);
+    hitSparkEmitter.setLifeTimeRange(300.0f, 600.0f);
+    hitSparkEmitter.setIsActive(false);
+    hitSparkEmitter.markConfigured();
+}
+
+void Character::applyDamage(float damageAmount, const Eigen::Vector3f& attackDirection)
 {
     hp = hp - damageAmount;
     if (hp < 0) hp = 0;
+
+    if (!hitSparkEmitter.isConfigured()) return;
+
+    Eigen::Vector3f emitPos = position + Eigen::Vector3f(0.f, 1.f, 0.f);
+    hitSparkEmitter.resetEmissionPoints({ emitPos });
+    hitSparkEmitter.setEmissionDirection(attackDirection);
+
+    static std::mt19937 gen(std::random_device{}());
+    std::uniform_int_distribution<int> countDist(10, 15);
+    int count = countDist(gen);
+    for (int i = 0; i < count; ++i) {
+        hitSparkEmitter.emit();
+    }
+}
+
+void Character::prepareHitSparksForDraw(const Eigen::Matrix4f& cameraViewMatrix)
+{
+    if (!hitSparkEmitter.isConfigured()) return;
+    hitSparkEmitter.prepareForDraw(cameraViewMatrix);
 }
 
 } // namespace ZL

src/Character.h

@@ -3,6 +3,7 @@
 #include "render/Renderer.h"
 #include "render/TextureManager.h"
 #include "items/Item.h"
+#include "SparkEmitter.h"
 #include <functional>
 #include <memory>
 #include <map>
@@ -51,7 +52,19 @@ public:
     void drawWithShadow(Renderer& renderer, const Eigen::Matrix4f& lightFromCamera, GLuint shadowMapTex, const Eigen::Vector3f& lightDirCamera);
 
 
-	void applyDamage(float damageAmount);
+	// attackDirection is a world-space horizontal vector pointing from the
+	// attacker toward this character — i.e. the direction the hit pushes
+	// them. A zero vector disables directional sparks (isotropic burst).
+	void applyDamage(float damageAmount, const Eigen::Vector3f& attackDirection = Eigen::Vector3f::Zero());
+
+	// Configures the per-character hit-spark emitter with the shared spark
+	// texture. Safe to call once per character after construction.
+	void setupHitSparks(std::shared_ptr<Texture> sparkTexture);
+
+	// Call per-frame between update() and draw(), with the active camera
+	// view matrix (world → eye). The emitter billboards and sorts its
+	// particles against that camera before its VBO is uploaded.
+	void prepareHitSparksForDraw(const Eigen::Matrix4f& cameraViewMatrix);
 
     // Public: read by Game for camera tracking and ray-cast origin
     Eigen::Vector3f position = Eigen::Vector3f(0.f, 0.f, 0.f);
@@ -92,6 +105,8 @@ public:
     std::string weaponAttachBoneName = "RightHand";
     bool showWeapon = true;
 
+    SparkEmitter hitSparkEmitter;
+
 
 private:
 

src/Location.cpp

@@ -44,6 +44,8 @@ namespace ZL
 		//auto playerTexture = std::make_shared<Texture>(CreateTextureDataFromPng("resources/w/gg/IMG_20260413_182354_992.png", CONST_ZIP_FILE));
 		auto playerTexture = std::make_shared<Texture>(CreateTextureDataFromPng("resources/w/gg/UniV_Grid_2K_Base_color.png", CONST_ZIP_FILE));
 
+		auto sparkTexture = std::make_shared<Texture>(CreateTextureDataFromPng("resources/w/spark.png", CONST_ZIP_FILE));
+
 		player = std::make_unique<Character>();
 		/*
 		player->loadBinaryAnimation(AnimationState::STAND, "resources/w/gg/gg_stand_idle001.anim", CONST_ZIP_FILE);
@@ -93,10 +95,14 @@ namespace ZL
 
 		player->canAttack = true;
 		player->isPlayer = true;
+		player->setupHitSparks(sparkTexture);
 		std::cout << "Load resurces step 9" << std::endl;
 
 		// Load NPCs from JSON
 		npcs = GameObjectLoader::loadAndCreate_Npcs("resources/config2/npcs.json", CONST_ZIP_FILE);
+		for (auto& npc : npcs) {
+			if (npc) npc->setupHitSparks(sparkTexture);
+		}
 
 		auto ghostTexture = std::make_shared<Texture>(CreateTextureDataFromPng("resources/w/ghost_skin001.png", CONST_ZIP_FILE));
 
@@ -125,6 +131,7 @@ namespace ZL
 		npc02->setTarget(npc02->position);
 		npc02->canAttack = true;
 		npc02->attackTarget = player.get();
+		npc02->setupHitSparks(sparkTexture);
 
 		npcs.push_back(std::move(npc02));
 
@@ -338,6 +345,10 @@ namespace ZL
 			}
 		}
 
+		const Eigen::Matrix4f currentView = renderer.GetCurrentModelViewMatrix();
+		if (player) player->prepareHitSparksForDraw(currentView);
+		for (auto& npc : npcs) npc->prepareHitSparksForDraw(currentView);
+
 		if (player) player->draw(renderer);
 		for (auto& npc : npcs) npc->draw(renderer);
 
@@ -499,12 +510,20 @@ namespace ZL
 #ifdef DEBUG_LIGHT
 		// In debug-light mode characters use the plain shaders (draw normally
 		// but from the light's viewpoint — projection/view already on stack).
+		{
+			const Eigen::Matrix4f currentView = renderer.GetCurrentModelViewMatrix();
+			if (player) player->prepareHitSparksForDraw(currentView);
+			for (auto& npc : npcs) npc->prepareHitSparksForDraw(currentView);
+		}
 		if (player) player->draw(renderer);
 		for (auto& npc : npcs) npc->draw(renderer);
 #else
 		// Characters use their own shadow-aware shaders
 		CheckGlError(__FILE__, __LINE__);
 
+		if (player) player->prepareHitSparksForDraw(cameraViewMatrix);
+		for (auto& npc : npcs) npc->prepareHitSparksForDraw(cameraViewMatrix);
+
 		if (player) player->drawWithShadow(renderer, lightFromCamera, shadowMap->getDepthTexture(), lightDirCamera);
 		CheckGlError(__FILE__, __LINE__);
 

src/SparkEmitter.cpp

@@ -38,7 +38,8 @@ namespace ZL {
 		scaleRange(copyFrom.scaleRange),
 		lifeTimeRange(copyFrom.lifeTimeRange),
 		shaderProgramName(copyFrom.shaderProgramName),
-		configured(copyFrom.configured), useWorldSpace(copyFrom.useWorldSpace)
+		configured(copyFrom.configured), useWorldSpace(copyFrom.useWorldSpace),
+		emissionDirection(copyFrom.emissionDirection)
 	{
 		// Each copy gets its own GPU buffers; only copy CPU-side data
 		sparkQuad.data = copyFrom.sparkQuad.data;
@@ -77,8 +78,12 @@ namespace ZL {
 		texture = tex;
 	}
 
-	void SparkEmitter::prepareDrawData(bool withRotation) {
+	void SparkEmitter::prepareDrawData(const Eigen::Matrix4f& cameraViewMatrix) {
-		if (!drawDataDirty) return;
+		const bool billboard = !cameraViewMatrix.isApprox(Eigen::Matrix4f::Identity());
+
+		// Billboarding depends on camera orientation every frame, so we must
+		// rebuild even when particle state hasn't changed.
+		if (!drawDataDirty && !billboard) return;
 
 		drawPositions.clear();
 		drawTexCoords.clear();
@@ -88,17 +93,32 @@ namespace ZL {
 			return;
 		}
 
+		// When billboarding, the camera's world-space right/up axes are the
+		// first two rows of the view matrix's rotation part. Sort key is
+		// eye-space Z (camera looks down -Z, so smaller z = farther; sorting
+		// ascending puts far particles first = back-to-front).
+		Vector3f camRight(1.f, 0.f, 0.f);
+		Vector3f camUp(0.f, 1.f, 0.f);
+		if (billboard) {
+			camRight = Vector3f(cameraViewMatrix(0, 0), cameraViewMatrix(0, 1), cameraViewMatrix(0, 2));
+			camUp    = Vector3f(cameraViewMatrix(1, 0), cameraViewMatrix(1, 1), cameraViewMatrix(1, 2));
+		}
+
 		std::vector<std::pair<const SparkParticle*, float>> sortedParticles;
 		sortedParticles.reserve(getActiveParticleCount());
 
 		for (const auto& particle : particles) {
-			if (particle.active) {
+			if (!particle.active) continue;
-				Vector3f posCam;
+			float depthKey;
-
+			if (billboard) {
-				posCam = particle.position;
+				depthKey = cameraViewMatrix(2, 0) * particle.position(0)
-
+				         + cameraViewMatrix(2, 1) * particle.position(1)
-				sortedParticles.push_back({ &particle, posCam(2) });
+				         + cameraViewMatrix(2, 2) * particle.position(2)
+				         + cameraViewMatrix(2, 3);
+			} else {
+				depthKey = particle.position(2);
 			}
+			sortedParticles.push_back({ &particle, depthKey });
 		}
 
 		std::sort(sortedParticles.begin(), sortedParticles.end(),
@@ -108,13 +128,38 @@ namespace ZL {
 
 		for (const auto& [particlePtr, depth] : sortedParticles) {
 			const auto& particle = *particlePtr;
-			Vector3f posCam;
-			posCam = particle.position;
-		
-
 			float size = particleSize * particle.scale;
 
-			
+			if (billboard) {
+				Vector3f r = camRight * size;
+				Vector3f u = camUp * size;
+				const Vector3f& c = particle.position;
+
+				Vector3f bl = c - r - u;
+				Vector3f tl = c - r + u;
+				Vector3f tr = c + r + u;
+				Vector3f br = c + r - u;
+
+				drawPositions.push_back({ bl(0), bl(1), bl(2) });
+				drawTexCoords.push_back({ 0.0f, 0.0f });
+
+				drawPositions.push_back({ tl(0), tl(1), tl(2) });
+				drawTexCoords.push_back({ 0.0f, 1.0f });
+
+				drawPositions.push_back({ tr(0), tr(1), tr(2) });
+				drawTexCoords.push_back({ 1.0f, 1.0f });
+
+				drawPositions.push_back({ bl(0), bl(1), bl(2) });
+				drawTexCoords.push_back({ 0.0f, 0.0f });
+
+				drawPositions.push_back({ tr(0), tr(1), tr(2) });
+				drawTexCoords.push_back({ 1.0f, 1.0f });
+
+				drawPositions.push_back({ br(0), br(1), br(2) });
+				drawTexCoords.push_back({ 1.0f, 0.0f });
+			} else {
+				const Vector3f& posCam = particle.position;
+
 				drawPositions.push_back({ posCam(0) - size, posCam(1) - size, posCam(2) });
 				drawTexCoords.push_back({ 0.0f, 0.0f });
 
@@ -132,19 +177,18 @@ namespace ZL {
 
 				drawPositions.push_back({ posCam(0) + size, posCam(1) - size, posCam(2) });
 				drawTexCoords.push_back({ 1.0f, 0.0f });
-
+			}
-		
 		}
 
 		drawDataDirty = false;
 	}
 
-	 void SparkEmitter::prepareForDraw(bool withRotation) {
+	 void SparkEmitter::prepareForDraw(const Eigen::Matrix4f& cameraViewMatrix) {
 		if (!configured) return;
-		
+
-			prepareDrawData(withRotation);
+		prepareDrawData(cameraViewMatrix);
-		
+
-			if (!drawPositions.empty()) {
+		if (!drawPositions.empty()) {
 			sparkQuad.data.PositionData = drawPositions;
 			sparkQuad.data.TexCoordData = drawTexCoords;
 			sparkQuad.RefreshVBO();
@@ -368,6 +412,19 @@ namespace ZL {
 		float speed = speedDist(gen);
 		float zSpeed = zSpeedDist(gen);
 
+		if (emissionDirection.squaredNorm() > 1e-6f) {
+			// Directional mode: spray in a cone around emissionDirection.
+			Vector3f dir = emissionDirection.normalized();
+			Vector3f up(0.f, 1.f, 0.f);
+			if (std::fabs(dir.dot(up)) > 0.95f) up = Vector3f(1.f, 0.f, 0.f);
+			Vector3f right = dir.cross(up).normalized();
+			Vector3f forward = right.cross(dir).normalized();
+			std::uniform_real_distribution<float> spreadDist(-0.6f, 0.6f);
+			Vector3f v = (dir + right * spreadDist(gen) + forward * spreadDist(gen)).normalized() * speed;
+			v(1) += zSpeed;
+			return v;
+		}
+
 		// Теперь biasX берется из JSON
 		if (emitterIndex == 0) {
 			return Vector3f{

src/SparkEmitter.h

@@ -51,9 +51,18 @@ namespace ZL {
 		std::string shaderProgramName;
 
 		bool configured;
-		void prepareDrawData(bool withRotation);
+		// Rebuilds the CPU-side quad/UV arrays. If cameraViewMatrix is identity,
+		// particles are rendered as axis-aligned quads in world XY and sorted by
+		// world Z (legacy behavior). Otherwise quads are billboarded toward the
+		// camera using its world-space right/up axes, and particles are sorted
+		// back-to-front in eye space for correct alpha blending.
+		void prepareDrawData(const Eigen::Matrix4f& cameraViewMatrix);
 		bool useWorldSpace;
 
+		// When non-zero, velocities spray in a cone around this direction
+		// instead of the default planar XY + Z spread used by JSON emitters.
+		Vector3f emissionDirection = Vector3f{ 0.f, 0.f, 0.f };
+
 	public:
 		SparkEmitter();
 		SparkEmitter(const SparkEmitter& copyFrom);
@@ -74,11 +83,24 @@ namespace ZL {
 		void setUseWorldSpace(bool use) { useWorldSpace = use; }
 		bool loadFromJsonFile(const std::string& path, Renderer& renderer, const std::string& zipFile = "");
 
+		// Programmatic configuration (alternative to loadFromJsonFile).
+		// Ranges follow the same semantics as the JSON fields.
+		void setSpeedRange(float minVal, float maxVal) { speedRange.min = minVal; speedRange.max = maxVal; }
+		void setZSpeedRange(float minVal, float maxVal) { zSpeedRange.min = minVal; zSpeedRange.max = maxVal; }
+		void setScaleRange(float minVal, float maxVal) { scaleRange.min = minVal; scaleRange.max = maxVal; }
+		void setLifeTimeRange(float minVal, float maxVal) { lifeTimeRange.min = minVal; lifeTimeRange.max = maxVal; }
+		void setEmissionDirection(const Vector3f& dir) { emissionDirection = dir; }
+		void markConfigured() { configured = true; }
+		bool isConfigured() const { return configured; }
+
 		void update(float deltaTimeMs);
 		void emit(float ageMs = 0.0f, float lerpT = 0.0f);
 
 		// Вызывать ДО draw() в начале кадра: готовит данные и загружает в VBO.
-		void prepareForDraw(bool withRotation = true);
+		// Pass the current camera view matrix (world → eye) to billboard sparks
+		// toward the camera and sort them back-to-front. Identity (default)
+		// keeps the legacy non-billboarded behavior.
+		void prepareForDraw(const Eigen::Matrix4f& cameraViewMatrix = Eigen::Matrix4f::Identity());
 
 		void draw(Renderer& renderer, float zoom, int screenWidth, int screenHeight);
 		void draw(Renderer& renderer, float zoom, int screenWidth, int screenHeight, bool withRotation);