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Fix triangle rendering and wireframe

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This commit is contained in:
Doyle Thai
2016-11-16 13:00:59 +11:00
parent 339ae38b38
commit 21bf650298
8 changed files with 210 additions and 127 deletions
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src/Asteroid.c
+94 -67
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@@ -42,10 +42,7 @@ void initAssetManager(GameState *state)
i32 result =
asset_loadTTFont(assetManager, arena, "C:/Windows/Fonts/Arialbd.ttf");
if (result) {
ASSERT(TRUE);
}
if (result) ASSERT(TRUE);
}
void initRenderer(GameState *state, v2 windowSize) {
@@ -76,11 +73,12 @@ void initRenderer(GameState *state, v2 windowSize) {
glGenBuffers(ARRAY_COUNT(renderer->vbo), renderer->vbo);
GL_CHECK_ERROR();
// Bind buffers and configure vao, vao automatically intercepts
// glBindCalls and associates the state with that buffer for us
for (enum RenderMode mode = 0; mode < rendermode_count; mode++)
{
// Bind buffers and configure vao, vao automatically intercepts
// glBindCalls and associates the state with that buffer for us
glBindVertexArray(renderer->vao[rendermode_quad]);
glBindBuffer(GL_ARRAY_BUFFER, renderer->vbo[rendermode_quad]);
glBindVertexArray(renderer->vao[mode]);
glBindBuffer(GL_ARRAY_BUFFER, renderer->vbo[mode]);
glEnableVertexAttribArray(0);
u32 numVertexElements = 4;
@@ -92,20 +90,6 @@ void initRenderer(GameState *state, v2 windowSize) {
glBindVertexArray(0);
}
{
glBindVertexArray(renderer->vao[rendermode_triangle]);
glBindBuffer(GL_ARRAY_BUFFER, renderer->vbo[rendermode_triangle]);
glEnableVertexAttribArray(0);
u32 numVertexElements = 3;
u32 stride = sizeof(Vertex);
glVertexAttribPointer(0, numVertexElements, GL_FLOAT,
GL_FALSE, stride, (GLvoid *)0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindVertexArray(0);
}
/* Unbind */
GL_CHECK_ERROR();
@@ -183,37 +167,44 @@ INTERNAL b32 getKeyStatus(KeyState *key, enum ReadKeyType readType,
void asteroid_gameUpdateAndRender(GameState *state, Memory *memory,
v2 windowSize, f32 dt)
{
if (!state->init) {
if (!state->init)
{
memory_arenaInit(&state->persistentArena, memory->persistent,
memory->persistentSize);
memory_arenaInit(&state->transientArena, memory->transient,
memory->transientSize);
initAssetManager(state);
initRenderer(state, windowSize);
state->pixelsPerMeter = 70.0f;
{ // Init ship entity
Entity *ship = &state->entityList[state->entityIndex++];
ship->id = 0;
ship->pos = V2(100.0f, 100.0f);
ship->hitbox = V2(100.0f, 100.0f);
ship->size = V2(100.0f, 100.0f);
ship->scale = 1;
ship->type = entitytype_ship;
ship->direction = direction_null;
ship->tex = NULL;
ship->collides = FALSE;
Entity *ship = &state->entityList[state->entityIndex++];
ship->id = 0;
ship->pos = V2(100, 100);
ship->size = V2(25.0f, 50.0f);
ship->hitbox = ship->size;
ship->offset = v2_scale(ship->size, 0.5f);
ship->scale = 1;
ship->type = entitytype_ship;
ship->direction = direction_null;
ship->renderMode = rendermode_triangle;
ship->tex = NULL;
ship->collides = FALSE;
}
state->camera.pos = V2(0, 0);
state->camera.pos = V2(0, 0);
state->camera.size = state->renderer.size;
state->init = TRUE;
state->worldSize = windowSize;
state->init = TRUE;
debug_init(&state->persistentArena, windowSize,
state->assetManager.font);
}
memory_arenaInit(&state->transientArena, memory->transient,
memory->transientSize);
{
KeyState *keys = state->input.keys;
for (enum KeyCode code = 0; code < keycode_count; code++)
@@ -244,40 +235,40 @@ void asteroid_gameUpdateAndRender(GameState *state, Memory *memory,
Entity *entity = &state->entityList[i];
ASSERT(entity->type != entitytype_invalid);
v2 pivotPoint = {0};
if (entity->type == entitytype_ship) {
v2 acceleration = {0};
v2 ddP = {0};
if (getKeyStatus(&state->input.keys[keycode_up], readkeytype_repeat,
0.0f, dt))
{
acceleration.y = 1.0f;
}
// TODO(doyle): Renderer creates upfacing triangles by default,
// but we need to offset rotation so that our base "0 degrees"
// is right facing for trig to work
Radians rotation = DEGREES_TO_RADIANS((entity->rotation + 90.0f));
v2 direction = V2(math_cosf(rotation), math_sinf(rotation));
if (getKeyStatus(&state->input.keys[keycode_down],
readkeytype_repeat, 0.0f, dt))
{
acceleration.y = -1.0f;
ddP = v2_normalise(direction);
}
if (getKeyStatus(&state->input.keys[keycode_left],
readkeytype_repeat, 0.0f, dt))
{
acceleration.x = -1.0f;
entity->rotation += (120.0f) * dt;
}
if (getKeyStatus(&state->input.keys[keycode_right],
readkeytype_repeat, 0.0f, dt))
{
acceleration.x = 1.0f;
entity->rotation -= (120.0f) * dt;
}
if (acceleration.x != 0.0f && acceleration.y != 0.0f)
if (ddP.x != 0.0f && ddP.y != 0.0f)
{
// NOTE(doyle): Cheese it and pre-compute the vector for
// diagonal using pythagoras theorem on a unit triangle 1^2
// + 1^2 = c^2
acceleration = v2_scale(acceleration, 0.70710678118f);
ddP = v2_scale(ddP, 0.70710678118f);
}
/*
@@ -285,41 +276,77 @@ void asteroid_gameUpdateAndRender(GameState *state, Memory *memory,
newVelocity = a*t + oldVelocity
newPos = (a*t^2)/2 + oldVelocity*t + oldPos
*/
acceleration = v2_scale(acceleration, state->pixelsPerMeter * 25);
ddP = v2_scale(ddP, state->pixelsPerMeter * 25);
v2 oldVelocity = entity->velocity;
v2 resistance = v2_scale(oldVelocity, 4.0f);
acceleration = v2_sub(acceleration, resistance);
v2 oldDp = entity->dP;
v2 resistance = v2_scale(oldDp, 2.0f);
ddP = v2_sub(ddP, resistance);
entity->velocity = v2_add(v2_scale(acceleration, dt), oldVelocity);
entity->dP = v2_add(v2_scale(ddP, dt), oldDp);
v2 halfAcceleration = v2_scale(acceleration, 0.5f);
v2 halfAccelerationDtSquared =
v2_scale(halfAcceleration, (SQUARED(dt)));
v2 oldVelocityDt = v2_scale(oldVelocity, dt);
v2 oldPos = entity->pos;
entity->pos = v2_add(
v2_add(halfAccelerationDtSquared, oldVelocityDt), oldPos);
v2 ddPHalf = v2_scale(ddP, 0.5f);
v2 ddPHalfDtSquared = v2_scale(ddPHalf, (SQUARED(dt)));
v2 oldDpDt = v2_scale(oldDp, dt);
v2 oldPos = entity->pos;
entity->pos = v2_add(v2_add(ddPHalfDtSquared, oldDpDt), oldPos);
pivotPoint = v2_scale(entity->size, 0.5f);
}
RenderFlags flags = renderflag_wireframe;
renderer_entity(&state->renderer, state->camera, entity, V2(0, 0),
0, V4(0.4f, 0.8f, 1.0f, 1.0f), flags);
if (entity->pos.y >= state->worldSize.h)
{
entity->pos.y = 0;
}
else if (entity->pos.y < 0)
{
entity->pos.y = state->worldSize.h;
}
if (entity->pos.x >= state->worldSize.w)
{
entity->pos.x = 0;
}
else if (entity->pos.x < 0)
{
entity->pos.x = state->worldSize.w;
}
DEBUG_PUSH_VAR("Pos: %5.2f, %5.2f", entity->pos, "v2");
DEBUG_PUSH_VAR("Velocity: %5.2f, %5.2f", entity->dP, "v2");
DEBUG_PUSH_VAR("Rotation: %5.2f", entity->rotation, "f32");
RenderFlags flags = renderflag_wireframe | renderflag_no_texture;
renderer_entity(&state->renderer, state->camera, entity, pivotPoint, 0,
V4(0.4f, 0.8f, 1.0f, 1.0f), flags);
v2 rightAlignedP = v2_add(entity->pos, entity->hitbox);
renderer_rect(&state->renderer, state->camera, rightAlignedP, V2(10, 10),
V2(0, 0), DEGREES_TO_RADIANS(entity->rotation), NULL,
V4(0.4f, 0.8f, 1.0f, 1.0f), flags);
v2 leftAlignedP = entity->pos;
renderer_rect(&state->renderer, state->camera, leftAlignedP, V2(10, 10),
V2(0, 0), DEGREES_TO_RADIANS(entity->rotation), NULL,
V4(0.4f, 0.8f, 1.0f, 1.0f), flags);
}
TrianglePoints triangle = {0};
triangle.points[0] = V2(100, 200);
triangle.points[2] = V2(100, 300);
triangle.points[1] = V2(200, 100);
triangle.points[2] = V2(100, 300);
LOCAL_PERSIST Radians rotation = 0.0f;
rotation += DEGREES_TO_RADIANS(((60.0f) * dt));
RenderFlags flags = renderflag_wireframe;
RenderFlags flags = renderflag_wireframe | renderflag_no_texture;
renderer_triangle(&state->renderer, state->camera, triangle, V2(0, 0),
rotation, NULL, V4(1, 1, 1, 1), flags);
debug_drawUi(state, dt);
debug_clearCounter();
renderer_renderGroups(&state->renderer);
}