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-rw-r--r--themes/LeafParticleRender.cpp46
-rw-r--r--themes/LeafParticleRender.h14
-rwxr-xr-xthemes/dist/output.wasmbin54718 -> 55929 bytes
3 files changed, 57 insertions, 3 deletions
diff --git a/themes/LeafParticleRender.cpp b/themes/LeafParticleRender.cpp
index df2a453..c006c06 100644
--- a/themes/LeafParticleRender.cpp
+++ b/themes/LeafParticleRender.cpp
@@ -3,11 +3,13 @@
#include "mathlib.h"
#include "TreeShape.h"
#include "types.h"
+#include <math.h>
const int32 verticesPerLeaf = 6;
const float32 leafRadius = 3.f;
+const int32 fallChanceMax = 100;
-inline void createLeaf(Renderer2dVertex* vertices, Vector2 position, Vector4 color) {
+inline void updateLeaf(Renderer2dVertex* vertices, Vector2 position, Vector4 color) {
Vector2 bottomLeft = Vector2(-leafRadius, -leafRadius) + position;
Vector2 bottomRight = Vector2(leafRadius, -leafRadius) + position;
Vector2 topLeft = Vector2(-leafRadius, leafRadius) + position;
@@ -34,6 +36,7 @@ void LeafParticleRender::load(Renderer2d *renderer, TreeShapeLoadResult* lr) {
int32 randomBranch = randomIntBetween(0, lr->numBranches);
int32 randomVertex = randomIntBetween(0, 6); // TODO: Manually entering num vertices per branch.
updateData[leafIdx].vertexToFollow = &lr->updateData[randomBranch].vertices[randomVertex];
+ updateData[leafIdx].fallChance = randomIntBetween(0, fallChanceMax);
updateData[leafIdx].color = Vector4(randomFloatBetween(0.3, 0.9), randomFloatBetween(0.1, 0.6), 0, 1);
updateData[leafIdx].vertexPtr = &vertices[leafIdx * verticesPerLeaf];
}
@@ -58,10 +61,47 @@ void LeafParticleRender::load(Renderer2d *renderer, TreeShapeLoadResult* lr) {
}
void LeafParticleRender::update(float32 dtSeconds) {
+ elapsedTimeSeconds += dtSeconds;
+
+ // Every time the fallIntervalSeconds passes, we remove one leaf
+ // from the tree and send it barrelling towards the earth.
+ int32 fallRoll;
+ bool didGenerateFall = false;
+ if (elapsedTimeSeconds >= fallIntervalSeconds) {
+ fallRoll = randomIntBetween(0, fallChanceMax);
+ didGenerateFall = true;
+ elapsedTimeSeconds = 0;
+ }
+
for (int32 leafIdx = 0; leafIdx < numLeaves; leafIdx++) {
auto updateDataItem = &updateData[leafIdx];
- createLeaf(updateDataItem->vertexPtr, updateDataItem->vertexToFollow->position, updateDataItem->color);
+ if (didGenerateFall) {
+ if (!updateDataItem->isFalling && updateDataItem->fallChance == fallRoll) {
+ updateDataItem->isFalling = true;
+ updateDataItem->fallPosition = updateDataItem->vertexToFollow->position;
+ updateDataItem->fallVerticalVelocity = -randomFloatBetween(15.f, 25.f);
+ updateDataItem->fallHorizontalFrequency = randomFloatBetween(3.f, 5.f);
+ }
+ }
+
+ if (updateDataItem->onGround) {
+
+ }
+ else if (updateDataItem->isFalling) {
+ updateDataItem->timeFallingSeconds += dtSeconds;
+ const float32 xPosUpdate = cosf(updateDataItem->fallHorizontalFrequency * updateDataItem->timeFallingSeconds);
+ updateDataItem->fallPosition.x += xPosUpdate;
+ updateDataItem->fallPosition.y += updateDataItem->fallVerticalVelocity * dtSeconds;
+ if (updateDataItem->fallPosition.y <= 25.f) { // TODO: Hardcoded ground for now
+ updateDataItem->fallPosition.y = 25.f;
+ updateDataItem->onGround = true;
+ }
+ updateLeaf(updateDataItem->vertexPtr, updateDataItem->fallPosition, updateDataItem->color);
+ }
+ else {
+ updateLeaf(updateDataItem->vertexPtr, updateDataItem->vertexToFollow->position, updateDataItem->color);
+ }
}
}
@@ -80,4 +120,6 @@ void LeafParticleRender::unload() {
glDeleteVertexArrays(1, &vao);
glDeleteBuffers(1, &vbo);
delete [] vertices;
+
+ elapsedTimeSeconds = 0;
} \ No newline at end of file
diff --git a/themes/LeafParticleRender.h b/themes/LeafParticleRender.h
index c305363..0627322 100644
--- a/themes/LeafParticleRender.h
+++ b/themes/LeafParticleRender.h
@@ -15,11 +15,23 @@ struct LeafParticleUpdateData {
Renderer2dVertex* vertexToFollow = NULL;
Vector4 color = Vector4(1.f, 0.f, 0.f, 0.f);
float32 scale = 1.f;
- Vector2 fallDirection;
+
+ float32 timeFallingSeconds = 0.f;
+ bool isFalling = false;
+ int32 fallChance = -1;
+ Vector2 fallPosition;
+ float32 fallVerticalVelocity;
+ float32 fallHorizontalFrequency;
+
+ bool onGround = false;
+
Renderer2dVertex* vertexPtr = NULL;
};
struct LeafParticleRender {
+ float32 elapsedTimeSeconds = 0.5;
+ float32 fallIntervalSeconds = 1.f;
+
// Update data
int32 numLeaves = 0;
diff --git a/themes/dist/output.wasm b/themes/dist/output.wasm
index 32331e3..d341f4f 100755
--- a/themes/dist/output.wasm
+++ b/themes/dist/output.wasm
Binary files differ