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111 lines
2.4 KiB
C
111 lines
2.4 KiB
C
// general.h
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//
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// Copyright 1998 by David K. McAllister.
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//
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// This file implements the API calls that are not particle actions.
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#ifndef particledefs_h
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#define particledefs_h
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#include "p_vector.h"
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#ifdef WIN32
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#include <windows.h>
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// removed <<< cgc >>>
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//#ifdef PARTICLEDLL_EXPORTS
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//#define PARTICLEDLL_API __declspec(dllexport)
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//#else
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//#define PARTICLEDLL_API __declspec(dllimport)
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//#endif
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#define PARTICLEDLL_API extern "C"
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// removed <<< cgc >>>
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#else
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#define PARTICLEDLL_API
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#endif
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#ifdef _WIN32
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#pragma warning (disable:4244)
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#endif
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// Actually this must be < sqrt(MAXFLOAT) since we store this value squared.
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#define P_MAXFLOAT 1.0e16f
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#ifdef MAXINT
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#define P_MAXINT MAXINT
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#else
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#define P_MAXINT 0x7fffffff
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#endif
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#define P_EPS 1e-3f
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//////////////////////////////////////////////////////////////////////
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// Type codes for domains
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PARTICLEDLL_API enum PDomainEnum
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{
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PDPoint = 0, // Single point
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PDLine = 1, // Line segment
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PDTriangle = 2, // Triangle
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PDPlane = 3, // Arbitrarily-oriented plane
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PDBox = 4, // Axis-aligned box
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PDSphere = 5, // Sphere
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PDCylinder = 6, // Cylinder
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PDCone = 7, // Cone
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PDBlob = 8, // Gaussian blob
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PDDisc = 9, // Arbitrarily-oriented disc
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PDRectangle = 10 // Rhombus-shaped planar region
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};
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// A single particle
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struct Particle
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{
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pVector pos;
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pVector posB;
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pVector size;
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pVector vel;
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pVector velB; // Used to compute binormal, normal, etc.
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pVector color; // Color must be next to alpha so glColor4fv works.
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float alpha; // This is both cunning and scary.
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float age;
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};
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// A group of particles - Info and an array of Particles
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struct ParticleGroup
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{
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int p_count; // Number of particles currently existing.
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int max_particles; // Max particles allowed in group.
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int particles_allocated; // Actual allocated size.
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Particle list[1]; // Actually, num_particles in size
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inline void Remove(int i)
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{
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list[i] = list[--p_count];
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}
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inline bool Add(const pVector &pos, const pVector &posB,
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const pVector &size, const pVector &vel, const pVector &color,
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const float alpha = 1.0f,
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const float age = 0.0f)
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{
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if(p_count >= max_particles)
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return false;
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else
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{
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list[p_count].pos = pos;
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list[p_count].posB = posB;
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list[p_count].size = size;
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list[p_count].vel = vel;
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list[p_count].velB = vel; // XXX This should be fixed.
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list[p_count].color = color;
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list[p_count].alpha = alpha;
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list[p_count].age = age;
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p_count++;
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return true;
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}
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}
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};
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#endif
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