115 lines
3.1 KiB
Plaintext
115 lines
3.1 KiB
Plaintext
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//let imgEffect = dirCurrent ~ "./img/Kevin_Effect.png";
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int PetalEffect = ObjParticleList_Create(OBJ_PARTICLE_LIST_2D);
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task InitEffect(){
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_EffectListPreRender(PetalEffect, imgEffect, [0, 0, 256, 256]);
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}
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let imgEffect = dirCurrent ~ "./img/Kevin_Effect.png";
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// Enemy deletion/explosion effects.
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// This particle list is used for all instances of the effect.
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task _EffectListPreRender(
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int targetList,
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texture, int[] rect
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){
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ObjPrim_SetTexture(targetList, texture);
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Obj_SetRenderPriorityI(targetList, 39);
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ObjPrim_SetPrimitiveType(targetList, PRIMITIVE_TRIANGLELIST);
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ObjPrim_SetVertexCount(targetList, 4);
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ObjRender_SetBlendType(targetList, BLEND_ALPHA);
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// Left-top, right-top, left-bottom, right-bottom
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ObjPrim_SetVertexUVT(targetList, 0, rect[0], rect[1]);
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ObjPrim_SetVertexUVT(targetList, 1, rect[2], rect[1]);
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ObjPrim_SetVertexUVT(targetList, 2, rect[0], rect[3]);
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ObjPrim_SetVertexUVT(targetList, 3, rect[2], rect[3]);
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// Vertex positions are offset with deltas so that the sprite is centered
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float dU = (rect[2] - rect[0])/2;
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float dV = (rect[3] - rect[1])/2;
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ObjPrim_SetVertexPosition(targetList, 0, -dU, -dV, 1);
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ObjPrim_SetVertexPosition(targetList, 1, dU, -dV, 1);
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ObjPrim_SetVertexPosition(targetList, 2, -dU, dV, 1);
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ObjPrim_SetVertexPosition(targetList, 3, dU, dV, 1);
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ObjPrim_SetVertexIndex(targetList, [0, 1, 2, 1, 2, 3]);
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}
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// Enemy go Boom
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/*
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5 flower petals appear from the enemy and spin outwards.
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Their angle constantly changes and their alpha lowers over time.
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*/
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task _ExplosionEffect(float enmX, float enmY, int targetList){
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int i = 0;
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int effectLength = 45;
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int effectNum = 5;
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int dir = 1;
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Obj_SetRenderPriorityI(targetList, 40);
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//TExplosionA(enmX, enmY, 255/effectLength, 9/effectLength);
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/*ascent(i in 0..effectNum){
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_CreatePetal(rand(5, 10)*dir, rand(5, 10)*dir, rand(0, 360));
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dir *= -1;
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//_CreatePetal(rand(50, 80), rand(-80, -50), rand(0, 360));
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}*/
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_CreatePetal(rand(8, 11), rand(-8, -11), rand(0, 360));
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_CreatePetal(rand(-11, -8), rand(-2, 2), rand(0, 360));
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_CreatePetal(rand(8, 8), rand(-2, 2), rand(0, 360));
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_CreatePetal(rand(-11, -8), rand(8, 11), rand(0, 360));
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_CreatePetal(rand(8, 11), rand(8, 11), rand(0, 360));
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ObjSound_Play(sfxBoom);
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// Create a petal with:
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// x offset every frame, y offset every frame
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task _CreatePetal(float spdX, float spdY, float baseAng){
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float x = enmX, y = enmY;
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let x_speed = spdX;
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let y_speed = spdY;
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let z_add = rand(-5, 5);
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ascent(i in 0..effectLength){
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_PetalMovement(Interpolate_Decelerate(1.5, 0.5, i/effectLength), Interpolate_Decelerate(255, 0, i/effectLength));
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yield;
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}
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task _PetalMovement(scale, alpha){
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ObjParticleList_SetScale(targetList, scale);
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ObjParticleList_SetAngleZ(targetList, baseAng);
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ObjParticleList_SetPosition(targetList, x, y, 1);
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ObjParticleList_SetAlpha(targetList, alpha);
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//Submits the current data to an instance, cleared every frame.
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ObjParticleList_AddInstance(targetList);
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x += x_speed;
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y += y_speed;
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baseAng += z_add;
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yield;
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}
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}
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}
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