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#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#ifdef WIN32
#include <windows.h>
#endif
#include <GL/gl.h>
#ifndef M_PI
#define M_PI 3.14159265358979323846264
#endif
#include "main/shadowrecthandler.h"
#include "exception.h"
#include "demolib_prefs.h"
#if DEMOLIB_MAINLOOP
ShadowRectHandler::ShadowRectHandler(MainLoop *ml, const char *title, const char *elem, Hashtable *attr) :
Event(ml, title, elem, attr, "alpha")
{
}
ShadowRectHandler::~ShadowRectHandler()
{
}
void ShadowRectHandler::start_effect()
{
}
void ShadowRectHandler::draw_scene(float progress)
{
const float alpha = this->get_val("alpha", progress);
if (alpha == 1.0f) {
glDisable(GL_BLEND);
} else {
glColor4f(0.0f, 0.0f, 0.0f, alpha);
glEnable(GL_BLEND);
glBlendFunc(GL_ZERO, GL_ONE_MINUS_SRC_ALPHA);
}
glEnable(GL_STENCIL_TEST);
glStencilFunc(GL_NOTEQUAL, 0, 0xFFFFFFFFL);
glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
glDisable(GL_LIGHTING);
glDisable(GL_DEPTH_TEST);
glDisable(GL_CULL_FACE);
glDisable(GL_TEXTURE_2D);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho(0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 10.0f);
glBegin(GL_QUADS);
glVertex3f(0.0f, 1.0f, 0.0f);
glVertex3f(1.0f, 1.0f, 0.0f);
glVertex3f(1.0f, 0.0f, 0.0f);
glVertex3f(0.0f, 0.0f, 0.0f);
glEnd();
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
glDisable(GL_STENCIL_TEST);
}
void ShadowRectHandler::end_effect()
{
}
#endif
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