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Use a fullscreen quad when we're actually inside the light influence.

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This commit is contained in:
Andrzej Kapolka 2014-11-04 18:08:56 -08:00
parent 1763d8f7f0
commit feabd1d5b3
1 changed files with 41 additions and 9 deletions
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50
interface/src/renderer/DeferredLightingEffect.cpp
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@ -232,6 +232,8 @@ void DeferredLightingEffect::render() {
// enlarge the scales slightly to account for tesselation
const float SCALE_EXPANSION = 0.1f;
const glm::vec3& eyePoint = Application::getInstance()->getDisplayViewFrustum()->getPosition();
if (!_pointLights.isEmpty()) {
_pointLight.bind();
_pointLight.setUniformValue(_pointLightLocations.nearLocation, nearVal);
@ -250,9 +252,24 @@ void DeferredLightingEffect::render() {
glLightf(GL_LIGHT1, GL_QUADRATIC_ATTENUATION, light.quadraticAttenuation);
glPushMatrix();
glTranslatef(light.position.x, light.position.y, light.position.z);
Application::getInstance()->getGeometryCache()->renderSphere(light.radius * (1.0f + SCALE_EXPANSION), 32, 32);
float expandedRadius = light.radius * (1.0f + SCALE_EXPANSION);
if (glm::distance(eyePoint, glm::vec3(light.position)) < expandedRadius) {
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
renderFullscreenQuad();
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
} else {
glTranslatef(light.position.x, light.position.y, light.position.z);
Application::getInstance()->getGeometryCache()->renderSphere(expandedRadius, 32, 32);
}
glPopMatrix();
}
@ -282,15 +299,30 @@ void DeferredLightingEffect::render() {
glLightf(GL_LIGHT1, GL_SPOT_CUTOFF, glm::degrees(light.cutoff));
glPushMatrix();
glTranslatef(light.position.x, light.position.y, light.position.z);
glm::quat spotRotation = rotationBetween(glm::vec3(0.0f, 0.0f, -1.0f), light.direction);
glm::vec3 axis = glm::axis(spotRotation);
glRotatef(glm::degrees(glm::angle(spotRotation)), axis.x, axis.y, axis.z);
glTranslatef(0.0f, 0.0f, -light.radius * (1.0f + SCALE_EXPANSION * 0.5f));
float expandedRadius = light.radius * (1.0f + SCALE_EXPANSION);
Application::getInstance()->getGeometryCache()->renderCone(expandedRadius * glm::tan(light.cutoff),
expandedRadius, 32, 8);
float edgeRadius = expandedRadius / glm::cos(light.cutoff);
if (glm::distance(eyePoint, glm::vec3(light.position)) < edgeRadius) {
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
renderFullscreenQuad();
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
} else {
glTranslatef(light.position.x, light.position.y, light.position.z);
glm::quat spotRotation = rotationBetween(glm::vec3(0.0f, 0.0f, -1.0f), light.direction);
glm::vec3 axis = glm::axis(spotRotation);
glRotatef(glm::degrees(glm::angle(spotRotation)), axis.x, axis.y, axis.z);
glTranslatef(0.0f, 0.0f, -light.radius * (1.0f + SCALE_EXPANSION * 0.5f));
Application::getInstance()->getGeometryCache()->renderCone(expandedRadius * glm::tan(light.cutoff),
expandedRadius, 32, 8);
}
glPopMatrix();
}