C4Particle::DrawingData Struct Reference

#include <C4Particles.h>

Collaboration diagram for C4Particle::DrawingData:

Classes
struct	Vertex

Public Member Functions
void	SetOffset (float x, float y)
void	SetPointer (Vertex *startingVertex, bool initial=false)
void	SetColor (float r, float g, float b, float a=1.0f)
void	SetPosition (float x, float y, float size, float rotation=0.f, float stretch=1.f)
void	SetPhase (int phase, C4ParticleDef *sourceDef)
	DrawingData ()

Public Attributes
Vertex *	vertices
int	phase
float	currentStretch
float	originalSize
float	sizeX
float	sizeY
float	aspect
float	offsetX
float	offsetY

Static Public Attributes
static const int	vertexCountPerParticle

Detailed Description

Definition at line 239 of file C4Particles.h.

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Class Documentation

C4Particle::DrawingData::Vertex

struct C4Particle::DrawingData::Vertex

Definition at line 243 of file C4Particles.h.

Class Members
float	alpha
float	b
float	g
float	r
float	u
float	v
float	x
float	y

Constructor & Destructor Documentation

DrawingData()

C4Particle::DrawingData::DrawingData ( )

inline

Definition at line 304 of file C4Particles.h.

                      : currentStretch(1.f), originalSize(0.0001f), aspect(1.f), offsetX(0.f), offsetY(0.f)
        {
        }

Member Function Documentation

SetColor()

void C4Particle::DrawingData::SetColor ( float  r, float  g, float  b, float  a = 1.0f  )

inline

Definition at line 290 of file C4Particles.h.

        {
            for (int vertex = 0; vertex < 4; ++vertex)
            {
                vertices[vertex].r = r;
                vertices[vertex].g = g;
                vertices[vertex].b = b;
                vertices[vertex].alpha = a;
            }
        }

References a, C4Particle::DrawingData::Vertex::alpha, b, C4Particle::DrawingData::Vertex::b, C4Particle::DrawingData::Vertex::g, C4Particle::DrawingData::Vertex::r, and vertices.

Referenced by C4ParticleSystem::Create(), C4Particle::Exec(), and SetPointer().

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SetOffset()

void C4Particle::DrawingData::SetOffset ( float  x, float  y  )

inline

Definition at line 267 of file C4Particles.h.

        {
            offsetX = x;
            offsetY = y;
        }

References offsetX, and offsetY.

Referenced by C4ParticleSystem::Create().

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SetPhase()

void C4Particle::DrawingData::SetPhase	(	int	phase,
		C4ParticleDef *	sourceDef
	)

Definition at line 189 of file C4Particles.cpp.

{
    this->phase = phase;
    phase = phase % sourceDef->Length;
    int offsetY = phase / sourceDef->PhasesX;
    int offsetX = phase % sourceDef->PhasesX;
    float wdt = 1.0f / (float)sourceDef->PhasesX;
    int numOfLines = sourceDef->Length / sourceDef->PhasesX;
    float hgt = 1.0f / (float)numOfLines;
 
    float x = wdt * (float)offsetX;
    float y = hgt * (float)offsetY;
    float xr = x + wdt;
    float yr = y + hgt;
 
    vertices[0].u = x; vertices[0].v = yr;
    vertices[1].u = x; vertices[1].v = y;
    vertices[2].u = xr; vertices[2].v = yr;
    vertices[3].u = xr; vertices[3].v = y;
}

References C4ParticleDef::Length, and C4ParticleDef::PhasesX.

Referenced by C4ParticleSystem::Create(), and C4Particle::Exec().

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SetPointer()

void C4Particle::DrawingData::SetPointer ( Vertex *  startingVertex, bool  initial = false  )

inline

Definition at line 273 of file C4Particles.h.

        {
            vertices = startingVertex;
 
            if (initial)
            {
                vertices[0].u = 0.f; vertices[0].v = 1.f;
                vertices[1].u = 0.f; vertices[1].v = 0.f;
                vertices[2].u = 1.f; vertices[2].v = 1.f;
                vertices[3].u = 1.f; vertices[3].v = 0.f;
 
                SetColor(1.f, 1.f, 1.f, 1.f);
 
                phase = -1;
            }
        }

References phase, SetColor(), C4Particle::DrawingData::Vertex::u, C4Particle::DrawingData::Vertex::v, and vertices.

Referenced by C4ParticleChunk::AddNewParticle(), and C4ParticleChunk::ReserveSpace().

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SetPosition()

void C4Particle::DrawingData::SetPosition	(	float	x,
		float	y,
		float	size,
		float	rotation = 0.f,
		float	stretch = 1.f
	)

Definition at line 152 of file C4Particles.cpp.

{
    if (size != originalSize || stretch != currentStretch)
    {
        currentStretch = stretch;
        originalSize = std::max(size, 0.0001f); // a size of zero results in undefined behavior
        sizeX = originalSize / aspect;
        sizeY = originalSize * currentStretch;
    }
 
    if (rotation == 0.f)
    {
        vertices[0].x = x - sizeX + offsetX;
        vertices[0].y = y + sizeY + offsetY;
        vertices[1].x = x - sizeX + offsetX;
        vertices[1].y = y - sizeY + offsetY;
        vertices[2].x = x + sizeX + offsetX;
        vertices[2].y = y + sizeY + offsetY;
        vertices[3].x = x + sizeX + offsetX;
        vertices[3].y = y - sizeY + offsetY;
    }
    else
    {
        float sine = sinf(rotation);
        float cosine = cosf(rotation);
 
        vertices[0].x = x + ((-sizeX) * cosine - (+sizeY) * sine) + offsetX;
        vertices[0].y = y + ((-sizeX) *   sine + (+sizeY) * cosine) + offsetY;
        vertices[1].x = x + ((-sizeX) * cosine - (-sizeY) * sine) + offsetX;
        vertices[1].y = y + ((-sizeX) *   sine + (-sizeY) * cosine) + offsetY;
        vertices[2].x = x + ((+sizeX) * cosine - (+sizeY) * sine) + offsetX;
        vertices[2].y = y + ((+sizeX) *   sine + (+sizeY) * cosine) + offsetY;
        vertices[3].x = x + ((+sizeX) * cosine - (-sizeY) * sine) + offsetX;
        vertices[3].y = y + ((+sizeX) *   sine + (-sizeY) * cosine) + offsetY;
    }
}

References aspect, currentStretch, offsetX, offsetY, originalSize, sizeX, sizeY, vertices, C4Particle::DrawingData::Vertex::x, and C4Particle::DrawingData::Vertex::y.

Referenced by C4Particle::Exec(), and C4Particle::SetPosition().

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Member Data Documentation

aspect

float C4Particle::DrawingData::aspect

Definition at line 263 of file C4Particles.h.

Referenced by C4ParticleSystem::Create(), and SetPosition().

currentStretch

float C4Particle::DrawingData::currentStretch

Definition at line 260 of file C4Particles.h.

Referenced by SetPosition().

offsetX

float C4Particle::DrawingData::offsetX

Definition at line 265 of file C4Particles.h.

Referenced by SetOffset(), and SetPosition().

offsetY

float C4Particle::DrawingData::offsetY

Definition at line 265 of file C4Particles.h.

Referenced by SetOffset(), and SetPosition().

originalSize

float C4Particle::DrawingData::originalSize

Definition at line 261 of file C4Particles.h.

Referenced by SetPosition().

phase

int C4Particle::DrawingData::phase

Definition at line 258 of file C4Particles.h.

Referenced by C4Particle::Exec(), and SetPointer().

sizeX

float C4Particle::DrawingData::sizeX

Definition at line 262 of file C4Particles.h.

Referenced by SetPosition().

sizeY

float C4Particle::DrawingData::sizeY

Definition at line 262 of file C4Particles.h.

Referenced by SetPosition().

vertexCountPerParticle

const int C4Particle::DrawingData::vertexCountPerParticle

static

Definition at line 241 of file C4Particles.h.

Referenced by C4ParticleChunk::AddNewParticle(), and C4ParticleChunk::ReserveSpace().

vertices

Vertex* C4Particle::DrawingData::vertices

Definition at line 256 of file C4Particles.h.

Referenced by SetColor(), SetPointer(), and SetPosition().

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The documentation for this struct was generated from the following files:

• C4Particles.h
• C4Particles.cpp