Jay Dolan jdolan

Staff Engineer @ChewyInc Project Lead @quetoo

jdolan / render_loop.c

Last active January 10, 2023 14:45

This won't work, either..

jdolan / shadowmapping.glsl

Created January 10, 2023 14:35

Shadow sampler of a cubemap array texture in GLSL

	uniform samplerCubeArrayShadow texture_shadowmap_cube;

	/**
	* @return The fraction of the sample that is _not_ shadowed (0.0 - 1.0).
	*/
	float sample_shadowmap(in light_t light, in int index) {

	// the position of the fragment in light space
	vec4 position = vec4(light.model.xyz - vertex.model, 1.0);

jdolan / shadow_gs.glsl

Created January 10, 2023 14:34

Point shadows geometry shader using cubemap array texture

	void main() {

	light_t light = lights[light_index];

	vec4 translate = vec4(-light.model.xyz, 0.0);

	for (int i = 0; i < 6; i++) {
	gl_Layer = light_index * 6 + i;

	for (int j = 0; j < 3; j++) {

jdolan / r_occlude_wrong.c

Created January 10, 2023 14:32

Naive OpenGL Occlusion Query implementation (don't do this).

	glBeginQuery(GL_ANY_SAMPLES_PASSED, query->name);
	glDrawElements(GL_TRIANGLES, 36, GL_UNSIGNED_INT, query->elements); // draw the AABB
	glEndQuery(GL_ANY_SAMPLES_PASSED);

	glGetQueryObjectiv(query->name, GL_QUERY_RESULT, &query->result);
	if (query->result) {
	// draw the object(s) the query was guarding
	}

jdolan / r_occlude.c

Created January 10, 2023 14:29

Decoupling renderer framerate from occlusion query framerate.

	/**
	* @brief Updates and re-draws active occlusion queries for the current frame.
	*/
	void R_UpdateOcclusionQueries(r_view_t *view) {

	if (!r_occlude->integer) {
	return;
	}

	if (view->flags & VIEW_FLAG_NO_DELTA) {

jdolan / index.html

Created July 23, 2015 18:42

Bassdrive HTML5 player

	<audio controls autoplay="autoplay"><source src="http:///shouthost.com.17.streams.bassdrive.com:8200/;stream.mp3" type="audio/mp3">
	Your browser does not support the audio element.
	</audio>

jdolan / JSON.c

Created December 13, 2014 19:51

Parse a JSON file into a Dictionary and query it with JSONPath.

	Data *data = $(alloc(Data), initWithContentsOfFile, path);

	Dictionary *dict = $$(JSONSerialization, objectFromData, data, 0);

	Number *dataStoreInitConns = $$(JSONPath, objectWithPath, dict0, "$.web-app.servlet[0].init-param.dataStoreInitConns");

	assert(10 == (int) dataStoreInitConns->value);

	release(data);
	release(dict);

jdolan / config.h

Created June 16, 2014 22:59

Quake2World config.h

	/* config.h. Generated from config.h.in by configure. */
	/* config.h.in. Generated from configure.ac by autoheader. */

	/* Define to 1 to build a client. */
	#define BUILD_CLIENT 1

	/* Set to the canonical name of the target machine */
	#define BUILD_HOST "x86_64-darwin13.1.0"

	/* Define to 1 to build a master server. */

jdolan / r_bsp_model.c

Last active March 7, 2021 23:53

BSP surface unwinding for surface area calculation

	/*
	* @brief Unwinds the surface, iterating all non-collinear vertices.
	*
	* @return The next winding point, or NULL if the face is completely unwound.
	*/
	static const vec_t R_UnwindBspSurface(const r_bsp_model_t bsp, const r_bsp_surface_t *surf,
	const vec_t *last) {

	const int32_t *se = &bsp->surface_edges[surf->first_edge];
	const vec_t v0 = R_BSP_VERTEX(bsp, se)->position;

jdolan / r_entity.c

Last active December 29, 2015 18:39

Projection shadows

	/*
	* @brief Applies any configuration and tag alignment, populating the model-view
	* matrix for the entity in the process.
	*/
	static void R_SetMatrixForEntity(r_entity_t *e) {

	vec_t o = e->origin, a = e->angles;

	if (e->parent) {
	vec3_t forward, tmp;