Ayumiwii
141 lines
3.7 KiB
GLSL
141 lines
3.7 KiB
GLSL
#version 430
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uniform mat4 M;
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uniform mat4 V;
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uniform mat4 P;
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uniform vec3 OriginPos;
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uniform float TimeSinceDeath;
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uniform float EndOfDeath;
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uniform bool Gravity;
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uniform float GravityForce;
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uniform float ObjectRadius;
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uniform vec4 EndColor;
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uniform bool UseRandomness;
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uniform float RandomNumbers[10];
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uniform float RandomnessScalar;
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in VertexData{
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vec3 Position;
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vec3 Normal;
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vec2 TextureCoordinate;
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vec4 DiffuseColor;
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}Input[];
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out vec3 Normal;
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out vec3 Position;
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out vec2 TextureCoordinate;
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out vec4 DiffuseColor;
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out vec4 ExplosionColor;
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layout(triangles) in;
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layout(triangle_strip, max_vertices = 3) out;
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void main()
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{
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// surface vectors for triangle
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//vec3 v1 = Input[1].Position - Input[0].Position;
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//vec3 v2 = Input[2].Position - Input[0].Position;
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//vec3 v3 = Input[1].Position - OriginPos;
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//v3 = normalize(v3);
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// surface normal
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//vec3 normal = cross(v1, v2);
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//normal = normalize(normal);
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// calculate middle of a vectors
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vec3 v1 = Input[1].Position - Input[0].Position;
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vec3 v2 = Input[2].Position - Input[0].Position;
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vec3 v3 = Input[2].Position - (v1 / 2);
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vec3 v4 = Input[1].Position - (v2 / 2);
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//
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//vec3 oriToTri = Input[1].Position - OriginPos;
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//v5 = normalize(v3);
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// calculate intersection
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// normalize direction
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vec3 dir1 = normalize(v1);
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vec3 dir2 = normalize(v2);
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vec3 vecA = Input[2].Position - Input[1].Position; //o2 - o1
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vec3 vecB = cross(dir1, dir2);
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mat3 matrisA = mat3(vecA, dir2, vecB);
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mat3 matrisB = mat3(vecA, dir1, vecB);
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float lengthA = length(cross(dir1, dir2));
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lengthA = lengthA * lengthA;
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float s = determinant(matrisA) / lengthA;
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float t = determinant(matrisB) / lengthA;
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// center position of triangle
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vec3 centerPosS = Input[1].Position + (s * dir1);
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//vec3 centerPosT = Input[2].Position + (t * dir2);
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// center position of triangle to origin
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vec3 oriToCenterTri = normalize(centerPosS - OriginPos);
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float dist = distance(OriginPos, centerPosS);
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// The distance a polygon will travel under one second.
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float travelUnitS = EndOfDeath / ObjectRadius;
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// The distance a polygon will travel under the current frame.
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float travelUnitF = TimeSinceDeath * travelUnitS;
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float randomness = 0.0f;
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int randomIndex = int(mod(gl_PrimitiveIDIn, 10));
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// Explosion from origin
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for(int i = 0; i < gl_in.length(); i++)
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{
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//gl_in.gl_PrimitiveIDIn;
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if (UseRandomness == true)
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{
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switch (randomIndex)
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{
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case 0: randomness = RandomNumbers[0]; break;
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case 1: randomness = RandomNumbers[1]; break;
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case 2: randomness = RandomNumbers[2]; break;
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case 3: randomness = RandomNumbers[3]; break;
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case 4: randomness = RandomNumbers[4]; break;
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case 5: randomness = RandomNumbers[5]; break;
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case 6: randomness = RandomNumbers[6]; break;
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case 7: randomness = RandomNumbers[7]; break;
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case 8: randomness = RandomNumbers[8]; break;
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case 9: randomness = RandomNumbers[9]; break;
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}
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}
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float fullRandomness = dist + (randomness * RandomnessScalar);
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vec4 screenPos = gl_in[i].gl_Position;
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//if (dist + fullRandomness <= travelUnitF)
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if (fullRandomness <= travelUnitF)
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{
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vec4 changedPos = M * vec4(Input[i].Position + (oriToCenterTri * travelUnitF) - (oriToCenterTri * fullRandomness), 1.0); //objectspace
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if (Gravity == true)
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{
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changedPos.y = changedPos.y - pow((travelUnitF - fullRandomness) * GravityForce, 2);
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}
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screenPos = P*V * changedPos; //sceenspace
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}
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Normal = Input[i].Normal;
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Position = Input[i].Position;
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TextureCoordinate = Input[i].TextureCoordinate;
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DiffuseColor = Input[i].DiffuseColor;
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ExplosionColor = EndColor * travelUnitF;
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gl_Position = screenPos;
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//gl_Position = gl_in[i].gl_Position;
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EmitVertex();
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}
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} |