diff --git a/include/Game/Systems/ExplosionEffectSystem.h b/include/Game/Systems/ExplosionEffectSystem.h index 24eee955..d2eafa15 100644 --- a/include/Game/Systems/ExplosionEffectSystem.h +++ b/include/Game/Systems/ExplosionEffectSystem.h @@ -3,6 +3,7 @@ #include "Common.h" #include "Core/System.h" +#include "Engine/GLM.h" class ExplosionEffectSystem : public PureSystem { diff --git a/resources/Schema/Entities/GameMap.xml b/resources/Schema/Entities/GameMap.xml index c3a16361..473b9037 100644 --- a/resources/Schema/Entities/GameMap.xml +++ b/resources/Schema/Entities/GameMap.xml @@ -245,6 +245,13 @@ + + + + + + + diff --git a/resources/Shaders/ExplosionEffect.geom.glsl b/resources/Shaders/ExplosionEffect.geom.glsl index 44b44aa6..44ae568b 100644 --- a/resources/Shaders/ExplosionEffect.geom.glsl +++ b/resources/Shaders/ExplosionEffect.geom.glsl @@ -13,6 +13,11 @@ uniform float RandomnessScalar; uniform vec2 Velocity; uniform bool ColorByDistance; uniform bool ExponentialAccelaration; +uniform bool Reverse; +//uniform bool Gravity; +//uniform bool Rotation; +//uniform bool MaxRadius; +//uniform bool Pulsate; in VertexData{ vec3 Position; @@ -37,161 +42,141 @@ out VertexData{ layout(triangles) in; layout(triangle_strip, max_vertices = 3) out; +vec3 EqualTo(vec3 x, vec3 y) { + return 1.0 - abs(sign(x - y)); +} + +vec3 NotEqualTo(vec3 x, vec3 y) { + return abs(sign(x - y)); +} + +vec3 GreaterThan(vec3 x, vec3 y) { + return max(sign(x - y), 0.0); +} + +vec3 LessThan(vec3 x, vec3 y) { + return max(sign(y - x), 0.0); +} + +vec3 GreaterEqualTo(vec3 x, vec3 y) { + return 1.0 - LessThan(x, y); +} + +vec3 LessEqualTo(vec3 x, vec3 y) { + return 1.0 - GreaterThan(x, y); +} + // returns a "random" number based on input parameter float GetRandomNumber(int polygon_index) { - int randomIndex = int(mod(polygon_index, 50)); - - return RandomNumbers[randomIndex]; + return RandomNumbers[int(mod(polygon_index, 50))]; } -float randomNumber = 0.0; -float randomDistance = 0.0; - -void main() +vec3 CalcCenterOfTriangle(vec3 vertex0, vec3 vertex1, vec3 vertex2) { // calculate middle of vectors - vec3 v1 = Input[1].Position - Input[0].Position; - vec3 v2 = Input[2].Position - Input[0].Position; - vec3 v3 = Input[2].Position - (v1 / 2); - vec3 v4 = Input[1].Position - (v2 / 2); + vec3 dir1 = normalize(vertex1 - vertex0); + vec3 dir2 = normalize(vertex2 - vertex0); - // calculate intersection - - // normalize direction - vec3 dir1 = normalize(v1); - vec3 dir2 = normalize(v2); - - vec3 vecA = Input[2].Position - Input[1].Position; //o2 - o1 + vec3 vecA = vertex2 - vertex1; //o2 - o1 vec3 vecB = cross(dir1, dir2); mat3 matrisA = mat3(vecA, dir2, vecB); float lengthA = length(vecB); lengthA = lengthA * lengthA; - + float s = determinant(matrisA) / lengthA; // center position of triangle - vec3 centerOfTriangle = Input[1].Position + (s * dir1); - + return vertex1 + (s * dir1); +} + +void PassThingsThrough(int index) +{ + // pass through vertex data + Output.Normal = Input[index].Normal; + Output.Position = Input[index].Position; + Output.TextureCoordinate = Input[index].TextureCoordinate; + Output.Tangent = Input[index].Tangent; + Output.BiTangent = Input[index].BiTangent; + Output.ExplosionColor = EndColor; +} + +void main() +{ + vec3 centerOfTriangle = CalcCenterOfTriangle(Input[0].Position, Input[1].Position, Input[2].Position); + // center position of triangle to origin vector vec3 origin2TriangleCenterVector = centerOfTriangle - ExplosionOrigin; vec3 normalizedOrigin2TriangleCenterVector = normalize(origin2TriangleCenterVector); + // distance between origin and the center of the current triangle + float origin2TriangleCenterDistance = length(origin2TriangleCenterVector); + // time percentage until end of explosion (0.0-1.0) float timePercetage = TimeSinceDeath / ExplosionDuration; - // get a random number if randomness is enabled, otherwise the random number will be zero and won't affect the other algorithms - if (Randomness == true) - { - randomDistance = GetRandomNumber(gl_PrimitiveIDIn) * RandomnessScalar; - } + // get a random number if randomness is enabled, otherwise the random distance will be zero and won't affect the other algorithms + float randomDistance = GetRandomNumber(gl_PrimitiveIDIn) * RandomnessScalar * float(Randomness); vec2 randomVelocity = Velocity * (randomDistance + 1.0); // accelaration to use on current frame. is a interpolation between start and end value float currentVelocity = mix(randomVelocity.x, randomVelocity.y, timePercetage); - if (ExponentialAccelaration == true) - { - currentVelocity = pow(currentVelocity, 2) / 2.0; - } + // if the accelaration should be exponential + currentVelocity = currentVelocity * max(currentVelocity * float(ExponentialAccelaration), 1.0); - // distance between origin and the center of the current triangle - float origin2TriangleCenterDistance = length(origin2TriangleCenterVector); + // the distance the blast has moved since the beginning, i.e. its radius + float blastWave = TimeSinceDeath * currentVelocity; // the distance from origin to the triangle center with eventual randomness added - float fullDistanceWithRandomness = origin2TriangleCenterDistance + randomDistance; - - // vector from the triangle center to the explosion's shockwave - vec3 triangleCenter2ExplosionRadius = (normalizedOrigin2TriangleCenterVector * (TimeSinceDeath * currentVelocity)) - (normalizedOrigin2TriangleCenterVector * fullDistanceWithRandomness); + float origin2TriangleCenterDistanceWithRandomness = origin2TriangleCenterDistance + randomDistance; - // if the triangle is inside the blast radius... - if (fullDistanceWithRandomness <= (TimeSinceDeath * currentVelocity)) + vec3 triangleCenter2ExplosionRadius = (normalizedOrigin2TriangleCenterVector * blastWave) - (normalizedOrigin2TriangleCenterVector * origin2TriangleCenterDistanceWithRandomness); + + // if the triangle is inside the blast's radius... + float isInsideBlastRadius = LessEqualTo(vec3(origin2TriangleCenterDistanceWithRandomness), vec3(blastWave)).x; + + // calculate the max distance (s) the triangle will move + float accelaration = (randomVelocity.y - randomVelocity.x) / ExplosionDuration; + float maxDistance = (randomVelocity.x * ExplosionDuration) + (0.5 * accelaration * ExplosionDuration * ExplosionDuration); + + // if explosion color should be affected by distance instead of time... + if (ColorByDistance == true) { - float maxRadius = max(TimeSinceDeath * currentVelocity, (ExplosionDuration * currentVelocity)); - - float a = (randomVelocity.y - randomVelocity.x) / ExplosionDuration; - //float t = sqrt((2 * origin2TriangleCenterDistance) / a); - - // if explosion color should be affected by distance instead of time... - if (ColorByDistance == true) - { - // calculate the max distance (s) the triangle will move - float s = (randomVelocity.x * ExplosionDuration) + (0.5 * a * pow(ExplosionDuration, 2)); - float te = (length(triangleCenter2ExplosionRadius) / s); - - Output.ExplosionColor = EndColor; - Output.ExplosionPercentageElapsed = te; - - } - else - { - Output.ExplosionColor = EndColor; - Output.ExplosionPercentageElapsed = timePercetage; - - } - - // for every vertex on the triangle... - for (int i = 0; i < gl_in.length(); i++) - { - // move the triangle to the blast radius - vec3 ExplodedPosition = Input[i].Position + triangleCenter2ExplosionRadius; - - // pass through vertex data - Output.Normal = Input[i].Normal; - Output.Position = Input[i].Position; - Output.TextureCoordinate = Input[i].TextureCoordinate; - Output.Tangent = Input[i].Tangent; - Output.BiTangent = Input[i].BiTangent; - - // convert to model space for the gravity to always be in -y - vec4 ExplodedPositionInModelSpace = M * vec4(ExplodedPosition, 1.0); - - // if there is gravity, apply it - //if (Gravity == true) - //{ - // // ---DO THIS----> //ExplodedPositionInModelSpace.y = ExplodedPositionInModelSpace.y - TimeSinceHit; - // - // ExplodedPositionInModelSpace.y = ExplodedPositionInModelSpace.y - pow(TimeSinceDeath, 2); - //} - - // convert to screen space - gl_Position = P*V * ExplodedPositionInModelSpace; - EmitVertex(); - } + Output.ExplosionPercentageElapsed = (length(triangleCenter2ExplosionRadius) / maxDistance) * isInsideBlastRadius; } else { - // if explosion color should be affected by distance instead of time... - if (ColorByDistance == true) + Output.ExplosionPercentageElapsed = timePercetage; + } + + vec3 ExplodedPosition; + for (int i = 0; i < gl_in.length(); i++) + { + // move the triangle to the blast radius + if(Reverse == false) { - Output.ExplosionColor = EndColor; - Output.ExplosionPercentageElapsed = 0.0; + ExplodedPosition = Input[i].Position + (triangleCenter2ExplosionRadius * isInsideBlastRadius); } else { - Output.ExplosionColor = EndColor; - Output.ExplosionPercentageElapsed = timePercetage; - + // TODO: + // Remove ifs + // account for randomness + // account for velocity + // account for color + + ExplodedPosition = Input[i].Position + (triangleCenter2ExplosionRadius * maxDistance * (ExplosionDuration - TimeSinceDeath)); } + + // pass through vertex data + PassThingsThrough(i); - // for every vertex on the triangle... - for(int i = 0; i < gl_in.length(); i++) - { - // pass through vertex data - Output.Normal = Input[i].Normal; - Output.Position = Input[i].Position; - Output.TextureCoordinate = Input[i].TextureCoordinate; - Output.Tangent = Input[i].Tangent; - Output.BiTangent = Input[i].BiTangent; - - // no change in position, pass through vertex - gl_Position = gl_in[i].gl_Position; - EmitVertex(); - } + // convert to window space + gl_Position = P * V * M * vec4(ExplodedPosition, 1.0); + EmitVertex(); } - - //EndPrimitive(); -} +} \ No newline at end of file diff --git a/src/Game/Systems/ExplosionEffectSystem.cpp b/src/Game/Systems/ExplosionEffectSystem.cpp index 2704d2da..6ef668c0 100644 --- a/src/Game/Systems/ExplosionEffectSystem.cpp +++ b/src/Game/Systems/ExplosionEffectSystem.cpp @@ -2,13 +2,17 @@ void ExplosionEffectSystem::UpdateComponent(EntityWrapper& entity, ComponentWrapper& component, double dt) { - if ((double)component["TimeSinceDeath"] > (double)component["ExplosionDuration"]) { - (double)component["TimeSinceDeath"] = 0.f; - } - (double&)component["TimeSinceDeath"] += dt; + if ((double)component["TimeSinceDeath"] > (double)component["ExplosionDuration"]) { + (double)component["TimeSinceDeath"] = 0.f; + } - //if ((bool)Component["Gravity"] == true) { - // (bool)Component["ExponentialAccelaration"] = false; - //} -} + //((glm::vec2)component["Velocity"]).x = min(((glm::vec2)component["Velocity"]).x, ((glm::vec2)component["Velocity"]).y); + (double&)component["TimeSinceDeath"] += dt; + + //if ((bool)component["Pulsate"] == true) { + // if ((double)component["TimeSinceDeath"] > (double)component["ExplosionDuration"] * 0.5) { + // (bool)component["Reverse"] = true; + // } + //} +} \ No newline at end of file