Archive/TRX
0
0
Fork 0
mirror of https://github.com/LostArtefacts/TRX.git synced 2025-04-28 12:47:58 +03:00
Code Issues Projects Releases Packages Wiki Activity Actions 2

tr1/output/sprites: simplify projection matrix

Browse source
This commit is contained in:
Marcin Kurczewski 2025-03-31 20:53:13 +02:00
parent e88764f280
commit 88870ef539
3 changed files with 2 additions and 71 deletions
Download patch file Download diff file Expand all files Collapse all files

28
data/tr1/ship/shaders/sprites.glsl
View file

@ -1,21 +1,14 @@
#define NEW_ZBUFFER 0
#define NEUTRAL_SHADE 0x1000
#ifdef VERTEX
uniform samplerBuffer uUVW; // texture u, v, layer
uniform vec2 uViewportCenter;
uniform vec2 uViewportSize;
uniform mat4 uMatProjection;
uniform mat4 uMatProjectionOG;
uniform mat4 uMatModelView;
uniform float uWibbleOffset;
uniform vec2 uFog; // x = start, y = end
uniform float uPhdPersp;
uniform float uPhdResZ;
uniform float uPhdResZBuf;
layout(location = 0) in vec3 inPosition;
layout(location = 1) in vec2 inDisplacement;
layout(location = 2) in int inTextureIdx;
@ -25,7 +18,6 @@ out vec3 gUV; // x = u, y = v, z = layer
out float gShade;
void main(void) {
#if NEW_ZBUFFER
vec4 centerEyeSpace = uMatModelView * vec4(inPosition, 1.0);
centerEyeSpace.xy += inDisplacement;
gl_Position = uMatProjection * centerEyeSpace;
@ -34,26 +26,6 @@ void main(void) {
gl_Position.xyz =
waterWibble(gl_Position, uViewportSize, uWibbleOffset);
}
#else
vec3 localPos = inPosition;
vec3 worldPos = (uMatModelView * vec4(localPos, 1)).xyz;
if ((uMatProjection * vec4(worldPos, 1)).z <= 0) {
// Terrible hack:
// Push the vertex out of view (e.g. offscreen or behind clip).
// Works for entire sprites, because worldPos is the position of the
// sprite origin, the same for all vertices.
gl_Position = vec4(2.0, 2.0, 1.0, 1.0);
return;
}
vec3 screenCenterPos = vec3(
uViewportCenter + worldPos.xy * uPhdPersp / worldPos.z,
uPhdResZBuf - uPhdResZ / worldPos.z);
vec3 screenCornerPos = screenCenterPos;
screenCornerPos.xy += inDisplacement * uPhdPersp / worldPos.z;
gl_Position = (uMatProjectionOG * vec4(screenCornerPos, 1));
#endif
gUV = texelFetch(uUVW, int(inTextureIdx)).xyz;
gShade = inShade;